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{{about|a branch of knowledge}}{{pp-semi-indef}}{{pp-move-indef}}{{short description|systematic enterprise that builds and organizes knowledge}}{{Use mdy dates|date= July 2015}}{{Science}}File:CMB Timeline300 no WMAP.jpg|thumb|Right|260px|The UniverseUniverseScience (from the Latin word scientia, meaning "knowledge"){{OEtymD|science|accessdate= September 20, 2014}} is a systematic enterprise that builds and organizes knowledge in the form of testable explanations and predictions about the universe.BOOK, Wilson, E.O., 1999, The natural sciences, Consilience: The Unity of Knowledge, 49–71, Reprint, Vintage, New York, New York, 978-0-679-76867-8, "... modern science is a discovery as well as an invention. It was a discovery that nature generally acts regularly enough to be described by laws and even by mathematics; and required invention to devise the techniques, abstractions, apparatus, and organization for exhibiting the regularities and securing their law-like descriptions."— p.vii BOOK, Heilbron, J.L. (editor-in-chief), J. L. Heilbron, 2003, Preface, The Oxford Companion to the History of Modern Science, vii–X, New York, Oxford University Press, 978-0-19-511229-0, DICTIONARY, Merriam-Webster Online Dictionary, science,weblink October 16, 2011, Merriam-Webster, Inc, 3 a: knowledge or a system of knowledge covering general truths or the operation of general laws especially as obtained and tested through scientific method b: such knowledge or such a system of knowledge concerned with the physical world and its phenomena., The earliest roots of science can be traced to Ancient Egypt and Mesopotamia in around 3500 to 3000 BCE."The historian ... requires a very broad definition of "science" â€“ one that ... will help us to understand the modern scientific enterprise. We need to be broad and inclusive, rather than narrow and exclusive ... and we should expect that the farther back we go [in time] the broader we will need to be."  p.3—BOOK, Lindberg, David C., 2007, Science before the Greeks, The beginnings of Western science: the European Scientific tradition in philosophical, religious, and institutional context, 1–27, Second, Chicago, Illinois, University of Chicago Press, 978-0-226-48205-7, BOOK, Grant, Edward, 2007, Ancient Egypt to Plato, A History of Natural Philosophy: From the Ancient World to the Nineteenth Century, 1–26, First, New York, New York, Cambridge University Press, 978-052-1-68957-1, Their contributions to mathematics, astronomy, and medicine entered and shaped Greek natural philosophy of classical antiquity, whereby formal attempts were made to provide explanations of events in the physical world based on natural causes. After the fall of the Western Roman Empire, knowledge of Greek conceptions of the world deteriorated in Western Europe during the early centuries (400 to 1000 CE) of the Middle AgesBOOK, Lindberg, David C., 2007, The revival of learning in the West, The beginnings of Western science: the European Scientific tradition in philosophical, religious, and institutional context, 193–224, Second, Chicago, Illinois, University of Chicago Press, 978-0-226-48205-7, but was preserved in the Muslim world during the Islamic Golden Age.BOOK, Lindberg, David C., 2007, Islamic science, The beginnings of Western science: the European Scientific tradition in philosophical, religious, and institutional context, 163–92, Second, Chicago, Illinois, University of Chicago Press, 978-0-226-48205-7, The recovery and assimilation of Greek works and Islamic inquiries into Western Europe from the 10th to 13th century revived "natural philosophy",BOOK, Lindberg, David C., 2007, The recovery and assimilation of Greek and Islamic science, The beginnings of Western science: the European Scientific tradition in philosophical, religious, and institutional context, 225–53, 2nd, Chicago, Illinois, University of Chicago Press, 978-0-226-48205-7, which was later transformed by the Scientific Revolution that began in the 16th centuryBOOK, Principe, Lawrence M., 2011, Introduction, Scientific Revolution: A Very Short Introduction, 1–3, First, New York, New York, Oxford University Press, 978-0-199-56741-6, as new ideas and discoveries departed from previous Greek conceptions and traditions.BOOK, Lindberg, David C., 1990, Conceptions of the Scientific Revolution from Baker to Butterfield: A preliminary sketch, Reappraisals of the Scientific Revolution, David C. Lindberg, Robert S. Westman, 1–26, First, Chicago, Illinois, Cambridge University Press, 978-0-521-34262-9, BOOK, Lindberg, David C., 2007, The legacy of ancient and medieval science, The beginnings of Western science: the European Scientific tradition in philosophical, religious, and institutional context, 357–368, 2nd, Chicago, Illinois, University of Chicago Press, 978-0-226-48205-7, BOOK,weblink The Stanford Encyclopedia of Philosophy, Del Soldato, Eva, 2016, Metaphysics Research Lab, Stanford University, Zalta, Edward N., Fall 2016, BOOK, Grant, Edward, 2007, Transformation of medieval natural philosophy from the early period modern period to the end of the nineteenth century, A History of Natural Philosophy: From the Ancient World to the Nineteenth Century, 274–322, First, New York, New York, Cambridge University Press, 978-052-1-68957-1, The scientific method soon played a greater role in knowledge creation and it was not until the 19th century that many of the institutional and professional features of science began to take shape;BOOK, Cahan, David, From Natural Philosophy to the Sciences: Writing the History of Nineteenth-Century Science, 2003, University of Chicago Press, Chicago, Illinois, 978-0-226-08928-7, The Oxford English Dictionary dates the origin of the word "scientist" to 1834. along with the changing of "natural philosophy" to "natural science."BOOK, Harrison, Peter, Peter Harrison (historian), The Territories of Science and Religion, Chicago, University of Chicago Press, 2015, 164–165, 9780226184517, The changing character of those engaged in scientific endeavors was matched by a new nomenclature for their endeavors. The most conspicuous marker of this change was the replacement of "natural philosophy" by "natural science". In 1800 few had spoken of the "natural sciences" but by 1880, this expression had overtaken the traditional label "natural philosophy". The persistence of "natural philosophy" in the twentieth century is owing largely to historical references to a past practice (see figure 11). As should now be apparent, this was not simply the substitution of one term by another, but involved the jettisoning of a range of personal qualities relating to the conduct of philosophy and the living of the philosophical life., Modern science is typically divided into three major branches that consist of the natural sciences (e.g., biology, chemistry, and physics), which study nature in the broadest sense; the social sciences (e.g., economics, psychology, and sociology), which study individuals and societies; and the formal sciences (e.g., logic, mathematics, and theoretical computer science), which study abstract concepts. There is disagreement,BOOK, Bishop, Alan, 1991, Environmental activities and mathematical culture, Mathematical Enculturation: A Cultural Perspective on Mathematics Education,weblink 20–59, Norwell, Massachusetts, Kluwer Academic Publishers, 978-0-792-31270-3, BOOK, Philosophy of Science: Volume 1, From Problem to Theory, Bunge, Mario, 1998, Routledge, 978-0-765-80413-6, revised, 1, New York, New York, 3–50, The Scientific Approach, however, on whether the formal sciences actually constitute a science as they do not rely on empirical evidence.BOOK, Fetzer, James H., 2013, Computer reliability and public policy: Limits of knowledge of computer-based systems, Computers and Cognition: Why Minds are not Machines, 271–308, 1st, Newcastle, United Kingdom, Kluwer Academic Publishers, 978-1-443-81946-6, Disciplines that use existing scientific knowledge for practical purposes, such as engineering and medicine, are described as applied sciences.JOURNAL, 10.3205/zma000916, 4027809, 24872859, 2014, Fischer, M.R., Thinking and acting scientifically: Indispensable basis of medical education, GMS Zeitschrift für Medizinische Ausbildung, 31, 2, Doc24, Fabry, G, JOURNAL, Abraham, Reem Rachel, Clinically oriented physiology teaching: strategy for developing critical-thinking skills in undergraduate medical students, Advances in Physiology Education, 28, 3, 102–04, 10.1152/advan.00001.2004, 15319191, 2004, JOURNAL, Sinclair, Marius, On the Differences between the Engineering and Scientific Methods,weblink The International Journal of Engineering Education, WEB,weblink Engineering Technology :: Engineering Technology :: Purdue School of Engineering and Technology, IUPUI,, 2018-09-07, Science is based on research, which is commonly conducted in academic and research institutions as well as in government agencies and companies. The practical impact of scientific research has led to the emergence of science policies that seek to influence the scientific enterprise by prioritizing the development of commercial products, armaments, health care, and environmental protection.


Science in a broad sense existed before the modern era and in many historical civilizations.JOURNAL, Grant, Edward, History of Science: When Did Modern Science Begin?, The American Scholar, 1 January 1997, 66, 1, 105–113, 41212592, Modern science is distinct in its approach and successful in its results, so it now defines what science is in the strictest sense of the term.JOURNAL, Pingree, David, David Pingree, Hellenophilia versus the History of Science, Isis, December 1992, 83, 4, 554–63, 234257, 10.1086/356288, 1992Isis...83..554P, Science in its original sense was a word for a type of knowledge, rather than a specialized word for the pursuit of such knowledge. In particular, it was the type of knowledge which people can communicate to each other and share. For example, knowledge about the working of natural things was gathered long before recorded history and led to the development of complex abstract thought. This is shown by the construction of complex calendars, techniques for making poisonous plants edible, public works at national scale, such as those which harnessed the floodplain of the Yangtse with reservoirs,Sima Qian (司馬遷, d. 86 BCE) in his Records of the Grand Historian (太史公書) covering some 2500 years of Chinese history, records Sunshu Ao (孫叔敖, fl. c. 630–595 BCE – Zhou dynasty), the first known hydraulic engineer of China, cited in (Joseph Needham et al. (1971) Science and Civilisation in China 4.3 p. 271) as having built a reservoir which has lasted to this day. dams, and dikes, and buildings such as the Pyramids. However, no consistent conscious distinction was made between knowledge of such things, which are true in every community, and other types of communal knowledge, such as mythologies and legal systems. Metallurgy was known in prehistory, and the Vinča culture was the earliest known producer of bronze-like alloys. It is thought that early experimentation with heating and mixing of substances over time developed into alchemy.

Early cultures

File:Divinatory livers Louvre AO19837.jpg|thumb|upright=0.5|Clay models of animal livers dating between the nineteenth and eighteenth centuries BCE, found in the royal palace in Mari, SyriaMari, SyriaNeither the words nor the concepts "science" and "nature" were part of the conceptual landscape in the ancient near east.BOOK, Rochberg, Francesca, Shank, Michael, Numbers, Ronald, Harrison, Peter, Wrestling with Nature : From Omens to Science, 2011, University of Chicago Press, Chicago, 978-0226317830, 9, Ch.1 Natural Knowledge in Ancient Mesopotamia, The ancient Mesopotamians used knowledge about the properties of various natural chemicals for manufacturing pottery, faience, glass, soap, metals, lime plaster, and waterproofing;BOOK, McIntosh, Jane R., Ancient Mesopotamia: New Perspectives, 2005, ABC-CLIO, Santa Barbara, California, Denver, Colorado, and Oxford, England, 978-1-57607-966-9, 273–76,weblink harv, they also studied animal physiology, anatomy, and behavior for divinatory purposes and made extensive records of the movements of astronomical objects for their study of astrology.JOURNAL, Scientific Astronomy in Antiquity, A. Aaboe, Philosophical Transactions of the Royal Society, 276, 1257, 2 May 1974, 21–42, harv, 10.1098/rsta.1974.0007, 1974RSPTA.276...21A, 74272, The Mesopotamians had intense interest in medicine and the earliest medical prescriptions appear in Sumerian during the Third Dynasty of Ur ({{circa}} 2112 BCE – {{circa}} 2004 BCE).JOURNAL, Medicine, Surgery, and Public Health in Ancient Mesopotamia, R D. Biggs, Journal of Assyrian Academic Studies, 19, 1, 2005, 7–18, Nonetheless, the Mesopotamians seem to have had little interest in gathering information about the natural world for the mere sake of gathering information and mainly only studied scientific subjects which had obvious practical applications or immediate relevance to their religious system.

Classical antiquity

{{See also|Nature (philosophy)}}In classical antiquity, there is no real ancient analog of a modern scientist. Instead, well-educated, usually upper-class, and almost universally male individuals performed various investigations into nature whenever they could afford the time.BOOK, Lehoux, Daryn, Shank, Michael, Numbers, Ronald, Harrison, Peter, Wrestling with Nature : From Omens to Science, 2011, University of Chicago Press, Chicago, 978-0226317830, 39, 2. Natural Knowledge in the Classical World, Before the invention or discovery of the concept of "nature" (ancient Greek phusis) by the Pre-Socratic philosophers, the same words tend to be used to describe the natural "way" in which a plant grows,See the quotation in Homer (8th century BCE) Odyssey 10.302–03 and the "way" in which, for example, one tribe worships a particular god. For this reason, it is claimed these men were the first philosophers in the strict sense, and also the first people to clearly distinguish "nature" and "convention.""Progress or Return" in An Introduction to Political Philosophy: Ten Essays by Leo Strauss (Expanded version of Political Philosophy: Six Essays by Leo Strauss, 1975.) Ed. Hilail Gilden. Detroit: Wayne State UP, 1989.{{rp|209}} Natural philosophy, the precursor of natural science, was thereby distinguished as the knowledge of nature and things which are true for every community, and the name of the specialized pursuit of such knowledge was philosophy â€“ the realm of the first philosopher-physicists. They were mainly speculators or theorists, particularly interested in astronomy. In contrast, trying to use knowledge of nature to imitate nature (artifice or technology, Greek technÄ“) was seen by classical scientists as a more appropriate interest for artisans of lower social class.BOOK, History of Political Philosophy, Cropsey, 3rd, 209, Strauss,
The early Greek philosophers of the Milesian school, which was founded by Thales of Miletus and later continued by his successors Anaximander and Anaximenes, were the first to attempt to explain natural phenomena without relying on the supernatural.BOOK, O'Grady, Patricia F., Thales of Miletus: The Beginnings of Western Science and Philosophy, 2016, Routledge, New York City, New York and London, England, 978-0-7546-0533-1, 245,weblink harv, mdy-all, The Pythagoreans developed a complex number philosophyBOOK, Burkert, Walter, Walter Burkert, 1 June 1972, Lore and Science in Ancient Pythagoreanism,weblink Cambridge, Massachusetts, Harvard University Press, 978-0-674-53918-1, harv, live,weblink January 29, 2018, mdy-all, {{rp|467–68}} and contributed significantly to the development of mathematical science.{{rp|465}} The theory of atoms was developed by the Greek philosopher Leucippus and his student Democritus.BOOK, Pullman, Bernard, The Atom in the History of Human Thought, 1998, 978-0-19-515040-7, 31–33,weblink harv,, BOOK, Cohen, Henri, Lefebvre, Claire, Handbook of Categorization in Cognitive Science, 2017, Elsevier, Amsterdam, The Netherlands, 978-0-08-101107-2, 427, Second,weblink harv, The Greek doctor Hippocrates established the tradition of systematic medical scienceBOOK, Margotta, Roberto, 1968, The Story of Medicine,weblink vFZrAAAAMAAJ, New York City, New York, Golden Press, harv, BOOK, Touwaide, Alain, Medieval Science, Technology, and Medicine: An Encyclopedia, 2005, Glick, Thomas F., Livesey, Steven, Wallis, Faith, Routledge, New York City, New York and London, England, 978-0-415-96930-7, 224,weblink harv, and is known as "The Father of Medicine".BOOK, Leff, Samuel, Leff, Vera, 1956, From Witchcraft to World Health,weblink London, England, Macmillan Publishers, Macmillan, harv, File:Aristotle Altemps Inv8575.jpg|thumb|upright=0.75|Aristotle, 384–322 BCE, one of the early figures in the development of the scientific methodscientific methodA turning point in the history of early philosophical science was Socrates' example of applying philosophy to the study of human matters, including human nature, the nature of political communities, and human knowledge itself. The Socratic method as documented by Plato's dialogues is a dialectic method of hypothesis elimination: better hypotheses are found by steadily identifying and eliminating those that lead to contradictions. This was a reaction to the Sophist emphasis on rhetoric. The Socratic method searches for general, commonly held truths that shape beliefs and scrutinizes them to determine their consistency with other beliefs.WEB,weblink Plato, Apology, 17, 2017-11-01, live,weblink" title="">weblink January 29, 2018, mdy-all, Socrates criticized the older type of study of physics as too purely speculative and lacking in self-criticism. Socrates was later, in the words of his Apology, accused of corrupting the youth of Athens because he did "not believe in the gods the state believes in, but in other new spiritual beings". Socrates refuted these claims,WEB,weblink Plato, Apology, 27, 2017-11-01, live,weblink" title="">weblink January 29, 2018, mdy-all, but was sentenced to death.WEB,weblink Plato, Apology, section 30, 1966, Perseus Digital Library, Tufts University, November 1, 2016, live,weblink" title="">weblink January 27, 2017, mdy-all, {{rp| 30e}}Aristotle later created a systematic programme of teleological philosophy: Motion and change is described as the actualization of potentials already in things, according to what types of things they are. In his physics, the Sun goes around the Earth, and many things have it as part of their nature that they are for humans. Each thing has a formal cause, a final cause, and a role in a cosmic order with an unmoved mover. The Socratics also insisted that philosophy should be used to consider the practical question of the best way to live for a human being (a study Aristotle divided into ethics and political philosophy). Aristotle maintained that man knows a thing scientifically "when he possesses a conviction arrived at in a certain way, and when the first principles on which that conviction rests are known to him with certainty".BOOK, Aristotle, Nicomachean Ethics, H. Rackham,weblink live,weblink" title="">weblink March 17, 2012, mdy-all, September 22, 2010, 1139bThe Greek astronomer Aristarchus of Samos (310–230 BCE) was the first to propose a heliocentric model of the universe, with the Sun at the center and all the planets orbiting it.BOOK, McClellan III, James E., Dorn, Harold, Science and Technology in World History: An Introduction, 2015, Johns Hopkins University Press, Baltimore, Maryland, 978-1-4214-1776-9, 99–100,weblink harv, Aristarchus's model was widely rejected because it was believed to violate the laws of physics. The inventor and mathematician Archimedes of Syracuse made major contributions to the beginnings of calculus and has sometimes been credited as its inventor,BOOK, Edwards, C.H. Jr., The Historical Development of the Calculus, 1979, Springer-Verlag, New York City, New York, 978-0-387-94313-8, 75, First,weblink harv, although his proto-calculus lacked several defining features. Pliny the Elder was a Roman writer and polymath, who wrote the seminal encyclopedia Natural History,BOOK, Lawson, Russell M., Science in the Ancient World: An Encyclopedia, 2004, ABC-CLIO, Santa Barbara, California, 978-1-85109-539-1, 190–91,weblink harv, BOOK, Murphy, Trevor Morgan, Pliny the Elder's Natural History: The Empire in the Encyclopedia, 2004, Oxford University Press, Oxford, England, 9780199262885, 1,weblink harv, BOOK, Doode, Aude, Pliny's Encyclopedia: The Reception of the Natural History, 2010, Cambridge University Press, Cambridge, England, 9781139484534, 1,weblink harv, dealing with history, geography, medicine, astronomy, earth science, botany, and zoology.Other scientists or proto-scientists in Antiquity were Theophrastus, Euclid, Herophilos, Hipparchus, Ptolemy, and Galen.

Medieval science

File:Brain, G Reisch.png|thumb|De potentiis anime sensitive, Gregor Reisch (1504) Margarita philosophica. Medieval science postulated a ventricle of the brain as the location for our common sense,{{Citation | last = Smith | first = A. Mark | title = What is the History of Medieval Optics Really About? | journal = Proceedings of the American Philosophical Society | volume = 148 | issue = 2 | pages = 180–94 |date=June 2004 | jstor = 1558283 | pmid = 15338543}}{{rp|189}} where the forms from our sensory systemsensory system{{further|Byzantine science | Science in the medieval Islamic world | European science in the Middle Ages}}Because of the collapse of the Western Roman Empire due to the Migration Period an intellectual decline took place in the western part of Europe in the 400s. In contrast, the Byzantine Empire resisted the attacks from invaders, and preserved and improved upon the learning. John Philoponus, a Byzantine scholar in the 500s, questioned Aristotle's teaching of physics and to note its flaws.{{rp|pp.307, 311, 363, 402}} John Philoponus' criticism of Aristotelian principles of physics served as an inspiration to medieval scholars as well as to Galileo Galilei who ten centuries later, during the Scientific Revolution, extensively cited Philoponus in his works while making the case for why Aristotelian physics was flawed.BOOK, Lindberg, David C., 2007, Roman and early medieval science, The beginnings of Western science: the European Scientific tradition in philosophical, religious, and institutional context, 132–162, Second, Chicago, Illinois, University of Chicago Press, 978-0-226-48205-7, BOOK,weblink The Stanford Encyclopedia of Philosophy, Christian, Wildberg, Edward N., Zalta, May 1, 2018, Metaphysics Research Lab, Stanford University, Stanford Encyclopedia of Philosophy, During late antiquity and the early Middle Ages, the Aristotelian approach to inquiries on natural phenomena was used. Aristotle's four causes prescribed that four "why" questions should be answered in order to explain things scientifically.Aristotle, Physics II, 3, and Metaphysics V, 2 Some ancient knowledge was lost, or in some cases kept in obscurity, during the fall of the Western Roman Empire and periodic political struggles. However, the general fields of science (or "natural philosophy" as it was called) and much of the general knowledge from the ancient world remained preserved through the works of the early Latin encyclopedists like Isidore of Seville.BOOK, The Foundations of Modern Science in the Middle Ages: Their Religious, Institutional and Intellectual Contexts, Cambridge Studies in the History of Science, Edward, Grant, Cambridge University Press, 1996, 978-0521567626, 7–17,weblink However, Aristotle's original texts were eventually lost in Western Europe, and only one text by Plato was widely known, the Timaeus, which was the only Platonic dialogue, and one of the few original works of classical natural philosophy, available to Latin readers in the early Middle Ages. Another original work that gained influence in this period was Ptolemy's Almagest, which contains a geocentric description of the solar system.During late antiquity, in the Byzantine empire many Greek classical texts were preserved. Many Syriac translations were done by groups such as the Nestorians and Monophysites.BOOK, Grant, Edward, Islam and the eastward shift of Aristotelian natural philosophy, A History of Natural Philosophy: From the Ancient World to the Nineteenth Century, 2007, Cambridge University Press, 978-0-521-68957-1, 62–67, They played a role when they translated Greek classical texts into Arabic under the Caliphate, during which many types of classical learning were preserved and in some cases improved upon.{{efn|name= euclid,ptolemy|Alhacen had access to the optics books of Euclid and Ptolemy, as is shown by the title of his lost work A Book in which I have Summarized the Science of Optics from the Two Books of Euclid and Ptolemy, to which I have added the Notions of the First Discourse which is Missing from Ptolemy's Book From Ibn Abi Usaibia's catalog, as cited in {{harv|Smith|2001}}{{rp|91(vol .1), p. xv}}}} In addition, the neighboring Sassanid Empire established the medical Academy of Gondeshapur where Greek, Syriac and Persian physicians established the most important medical center of the ancient world during the 6th and 7th centuries.BOOK, The Cambridge history of Iran, 1968–1991, University Press, Fisher, W.B. (William Bayne), 978-0521200936, Cambridge, 745412, The House of Wisdom was established in Abbasid-era Baghdad, Iraq,ENCYCLOPEDIA,weblink Bayt al-Hikmah, Encyclopædia Britannica, November 3, 2016, live,weblink November 4, 2016, mdy-all, where the Islamic study of Aristotelianism flourished. Al-Kindi (801–873) was the first of the Muslim Peripatetic philosophers, and is known for his efforts to introduce Greek and Hellenistic philosophy to the Arab world.Klein-Frank, F. Al-Kindi. In Leaman, O & Nasr, H (2001). History of Islamic Philosophy. London: Routledge. p. 165. Felix Klein-Frank (2001) Al-Kindi, pp. 166–67. In Oliver Leaman & Hossein Nasr. History of Islamic Philosophy. London: Routledge. The Islamic Golden Age flourished from this time until the Mongol invasions of the 13th century. Ibn al-Haytham (Alhazen), as well as his predecessor Ibn Sahl, was familiar with Ptolemy's Optics, and used experiments as a means to gain knowledge.{{efn|"[Ibn al-Haytham] followed Ptolemy's bridge building ... into a grand synthesis of light and vision. Part of his effort consisted in devising ranges of experiments, of a kind probed before but now undertaken on larger scale."— {{harvnb|Cohen|2010|p=59}}}}BOOK, Oxford Dictionary of the Middle Ages, 2009, Science in Islam, JOURNAL, 228328, Toomer, G.J., Reviewed work: Ibn al-Haythams Weg zur Physik, Matthias Schramm, Isis, 55, 4, 463–65, 1964, 10.1086/349914, See p. 464: "Schramm sums up [Ibn Al-Haytham's] achievement in the development of scientific method.", p. 465: "Schramm has demonstrated .. beyond any dispute that Ibn al-Haytham is a major figure in the Islamic scientific tradition, particularly in the creation of experimental techniques." p. 465: "only when the influence of ibn al-Haytam and others on the mainstream of later medieval physical writings has been seriously investigated can Schramm's claim that ibn al-Haytam was the true founder of modern physics be evaluated."{{rp|463–65}} Alhazen disproved Ptolemy's theory of vision,{{harvnb|Smith|2001}}{{rp|Book I, [6.54]. p. 372}} but did not make any corresponding changes to Aristotle's metaphysics. Furthermore, doctors and alchemists such as the Persians Avicenna and Al-Razi also greatly developed the science of Medicine with the former writing the Canon of Medicine, a medical encyclopedia used until the 18th century and the latter discovering multiple compounds like alcohol. Avicenna's canon is considered to be one of the most important publications in medicine and they both contributed significantly to the practice of experimental medicine, using clinical trials and experiments to back their claims.BOOK, Encyclopaedia of the History of Science, Technology, and Medicine in Non-Western Cultures, 2006, 155–156,, 978-1-4020-4559-2, Selin, H, In Classical antiquity, Greek and Roman taboos had meant that dissection was usually banned in ancient times, but in Middle Ages it changed: medical teachers and students at Bologna began to open human bodies, and Mondino de Luzzi (c. 1275–1326) produced the first known anatomy textbook based on human dissection.BOOK,weblink 9780674057418, Numbers, Ronald, Galileo Goes to Jail and Other Myths about Science and Religion, 45, Harvard University Press, 2009, 978-0-674-03327-6, NEWS, Shwayder, Maya,weblink Debunking a myth, 7 April 2011, The Harvard Gazette, May 11, 2019, By the eleventh century most of Europe had become Christian; stronger monarchies emerged; borders were restored; technological developments and agricultural innovations were made which increased the food supply and population. In addition, classical Greek texts started to be translated from Arabic and Greek into Latin, giving a higher level of scientific discussion in Western Europe.By 1088, the first university in Europe (the University of Bologna) had emerged from its clerical beginnings. Demand for Latin translations grew (for example, from the Toledo School of Translators); western Europeans began collecting texts written not only in Latin, but also Latin translations from Greek, Arabic, and Hebrew. Manuscript copies of Alhazen's Book of Optics also propagated across Europe before 1240,{{harvnb|Smith|2001}}{{rp|Intro. p. xx}} as evidenced by its incorporation into Vitello's Perspectiva. Avicenna's Canon was translated into Latin.BOOK, The Canon of Medicine, McGinnis, Jon, Oxford University, 2010, 227, In particular, the texts of Aristotle, Ptolemy,{{efn|The translator, Gerard of Cremona (c. 1114–1187), inspired by his love of the Almagest, came to Toledo, where he knew he could find the Almagest in Arabic. There he found Arabic books of every description, and learned Arabic in order to translate these books into Latin, being aware of 'the poverty of the Latins'. â€”As cited by JOURNAL, 10.1017/S0269889701000096, The Coherence of the Arabic-Latin Translation Program in Toledo in the Twelfth Century, Science in Context, 14, 1–2, 249–88, 2002, Burnett, Charles, }} and Euclid, preserved in the Houses of Wisdom and also in the Byzantine Empire,BOOK, Lindberg, David, 1992, The Beginnings of Western Science, University of Chicago Press,weblink 162, 9780226482040, were sought amongst Catholic scholars. The influx of ancient texts caused the Renaissance of the 12th century and the flourishing of a synthesis of Catholicism and Aristotelianism known as Scholasticism in western Europe, which became a new geographic center of science. An experiment in this period would be understood as a careful process of observing, describing, and classifying.WEB,weblink St. Albertus Magnus | German theologian, scientist, and philosopher, 2017-10-27, live,weblink October 28, 2017, mdy-all, One prominent scientist in this era was Roger Bacon. Scholasticism had a strong focus on revelation and dialectic reasoning, and gradually fell out of favour over the next centuries, as alchemy's focus on experiments that include direct observation and meticulous documentation slowly increased in importance.

Renaissance and early modern science

File:Tycho instrument sextant mounting 19.jpg|thumb|right|Astronomy became more accurate after Tycho Brahe devised his scientific instruments for measuring angles between two celestial bodies, before the invention of the telescope. Brahe's observations were the basis for Kepler's lawsKepler's lawsNew developments in optics played a role in the inception of the Renaissance, both by challenging long-held metaphysical ideas on perception, as well as by contributing to the improvement and development of technology such as the camera obscura and the telescope. Before what we now know as the Renaissance started, Roger Bacon, Vitello, and John Peckham each built up a scholastic ontology upon a causal chain beginning with sensation, perception, and finally apperception of the individual and universal forms of Aristotle.JOURNAL, 3657358, Alhacen's Theory of Visual Perception: A Critical Edition, with English Translation and Commentary, of the First Three Books of Alhacen's "De aspectibus", the Medieval Latin Version of Ibn al-Haytham's "Kitāb al-Manāẓir": Volume One, Transactions of the American Philosophical Society, 91, 4, i–337, Smith, A. Mark, 2001, A model of vision later known as perspectivism was exploited and studied by the artists of the Renaissance. This theory uses only three of Aristotle's four causes: formal, material, and final.JOURNAL, 231249, 10.1086/352843, Getting the Big Picture in Perspectivist Optics, Isis, 72, 4, 568–89, Smith, A. Mark, 1981, In the sixteenth century, Copernicus formulated a heliocentric model of the solar system unlike the geocentric model of Ptolemy's Almagest. This was based on a theorem that the orbital periods of the planets are longer as their orbs are farther from the centre of motion, which he found not to agree with Ptolemy's model.JOURNAL, 10.1177/002182860203300301, Copernicus and the Origin of his Heliocentric System, Journal for the History of Astronomy, 33, 3, 219–35, 2016, Goldstein, Bernard R, Kepler and others challenged the notion that the only function of the eye is perception, and shifted the main focus in optics from the eye to the propagation of light.BOOK, Cohen, H. Floris, Floris Cohen, How modern science came into the world. Four civilizations, one 17th-century breakthrough, 2010, Amsterdam University Press, Amsterdam, 9789089642394, Second, harv, {{rp|102}} Kepler modelled the eye as a water-filled glass sphere with an aperture in front of it to model the entrance pupil. He found that all the light from a single point of the scene was imaged at a single point at the back of the glass sphere. The optical chain ends on the retina at the back of the eye.{{efn|Kepler, Johannes (1604) Ad Vitellionem paralipomena, quibus astronomiae pars opticae traditur (Supplements to Witelo, in which the optical part of astronomy is treated) as cited in JOURNAL, Smith, A. Mark, What Is the History of Medieval Optics Really about?, Proceedings of the American Philosophical Society, 1 January 2004, 148, 2, 180–94, 1558283, 15338543,
  • The full title translation is from p. 60 of James R. Voelkel (2001) Johannes Kepler and the New Astronomy Oxford University Press. Kepler was driven to this experiment after observing the partial solar eclipse at Graz, July 10, 1600. He used Tycho Brahe's method of observation, which was to project the image of the Sun on a piece of paper through a pinhole aperture, instead of looking directly at the Sun. He disagreed with Brahe's conclusion that total eclipses of the Sun were impossible, because there were historical accounts of total eclipses. Instead he deduced that the size of the aperture controls the sharpness of the projected image (the larger the aperture, the more accurate the image â€“ this fact is now fundamental for optical system design). Voelkel, p. 61, notes that Kepler's experiments produced the first correct account of vision and the eye, because he realized he could not accurately write about astronomical observation by ignoring the eye.}} Kepler is best known, however, for improving Copernicus' heliocentric model through the discovery of Kepler's laws of planetary motion. Kepler did not reject Aristotelian metaphysics, and described his work as a search for the Harmony of the Spheres.
File:Justus Sustermans - Portrait of Galileo Galilei, 1636.jpg|thumb|right| Vol. 24, No. 1, p. 36}}Galileo made innovative use of experiment and mathematics. However, he became persecuted after Pope Urban VIII blessed Galileo to write about the Copernican system. Galileo had used arguments from the Pope and put them in the voice of the simpleton in the work "Dialogue Concerning the Two Chief World Systems", which greatly offended Urban VIII.WEB,weblink Pope Urban VIII, van Helden, Al, 1995, The Galileo Project, November 3, 2016, live,weblink" title="">weblink November 11, 2016, mdy-all, In Northern Europe, the new technology of the printing press was widely used to publish many arguments, including some that disagreed widely with contemporary ideas of nature. René Descartes and Francis Bacon published philosophical arguments in favor of a new type of non-Aristotelian science. Descartes emphasized individual thought and argued that mathematics rather than geometry should be used in order to study nature. Bacon emphasized the importance of experiment over contemplation. Bacon further questioned the Aristotelian concepts of formal cause and final cause, and promoted the idea that science should study the laws of "simple" natures, such as heat, rather than assuming that there is any specific nature, or "formal cause", of each complex type of thing. This new science began to see itself as describing "laws of nature". This updated approach to studies in nature was seen as mechanistic. Bacon also argued that science should aim for the first time at practical inventions for the improvement of all human life.

Age of Enlightenment

File:GodfreyKneller-IsaacNewton-1689.jpg|thumb|upright= 1.0|left|Isaac Newton, shown here in a 1689 portrait, made seminal contributions to classical mechanics, gravity, and optics. Newton shares credit with Gottfried LeibnizGottfried LeibnizAs a precursor to the Age of Enlightenment, Isaac Newton and Gottfried Wilhelm Leibniz succeeded in developing a new physics, now referred to as classical mechanics, which could be confirmed by experiment and explained using mathematics (Newton (1687), Philosophiæ Naturalis Principia Mathematica). Leibniz also incorporated terms from Aristotelian physics, but now being used in a new non-teleological way, for example, "energy" and "potential" (modern versions of Aristotelian "energeia and potentia"). This implied a shift in the view of objects: Where Aristotle had noted that objects have certain innate goals that can be actualized, objects were now regarded as devoid of innate goals. In the style of Francis Bacon, Leibniz assumed that different types of things all work according to the same general laws of nature, with no special formal or final causes for each type of thing.MacTutor Archive, Gottfried Wilhelm von Leibniz It is during this period that the word "science" gradually became more commonly used to refer to a type of pursuit of a type of knowledge, especially knowledge of nature â€“ coming close in meaning to the old term "natural philosophy."During this time, the declared purpose and value of science became producing wealth and inventions that would improve human lives, in the materialistic sense of having more food, clothing, and other things. In Bacon's words, "the real and legitimate goal of sciences is the endowment of human life with new inventions and riches", and he discouraged scientists from pursuing intangible philosophical or spiritual ideas, which he believed contributed little to human happiness beyond "the fume of subtle, sublime, or pleasing speculation".BOOK,weblink The Social and Economic Roots of the Scientific Revolution: Texts by Boris Hessen and Henryk Grossmann, Freudenthal, Gideon, McLaughlin, Peter, 2009-05-20, Springer Science & Business Media, 9781402096044, Science during the Enlightenment was dominated by scientific societiesThomas G. Bergin (ed.), Encyclopedia of the Renaissance (Oxford and New York: New Market Books, 1987). and academies, which had largely replaced universities as centres of scientific research and development. Societies and academies were also the backbone of the maturation of the scientific profession. Another important development was the popularization of science among an increasingly literate population. Philosophes introduced the public to many scientific theories, most notably through the Encyclopédie and the popularization of Newtonianism by Voltaire as well as by Émilie du Châtelet, the French translator of Newton's Principia.Some historians have marked the 18th century as a drab period in the history of science;see Hall (1954), iii; Mason (1956), 223. however, the century saw significant advancements in the practice of medicine, mathematics, and physics; the development of biological taxonomy; a new understanding of magnetism and electricity; and the maturation of chemistry as a discipline, which established the foundations of modern chemistry.Enlightenment philosophers chose a short history of scientific predecessors â€“ Galileo, Boyle, and Newton principally â€“ as the guides and guarantors of their applications of the singular concept of nature and natural law to every physical and social field of the day. In this respect, the lessons of history and the social structures built upon it could be discarded.Cassels, Alan. Ideology and International Relations in the Modern World. p. 2.

19th century

File:Charles Darwin seated crop.jpg|thumb|right|upright=0.80|Charles Darwin in 1854, by then working towards publication of On the Origin of SpeciesOn the Origin of SpeciesThe nineteenth century is a particularly important period in the history of science since during this era many distinguishing characteristics of contemporary modern science began to take shape such as: transformation of the life and physical sciences, frequent use of precision instruments, emergence of terms like "biologist", "physicist", "scientist"; slowly moving away from antiquated labels like "natural philosophy" and "natural history", increased professionalization of those studying nature lead to reduction in amateur naturalists, scientists gained cultural authority over many dimensions of society, economic expansion and industrialization of numerous countries, thriving of popular science writings and emergence of science journals.BOOK, Lightman, Bernard, Shank, Michael, Numbers, Ronald, Harrison, Peter, Wrestling with Nature : From Omens to Science, 2011, University of Chicago Press, Chicago, 978-0226317830, 367, 13. Science and the Public, Early in the 19th century, John Dalton suggested the modern atomic theory, based on Democritus's original idea of individible particles called atoms.File:Candle-light-animated.gif|thumb|left|upright=0.80|Combustion and chemical reactions were studied by Michael Faraday and reported in his lectures before the Royal Institution: The Chemical History of a CandleThe Chemical History of a CandleBoth John Herschel and William Whewell systematized methodology: the latter coined the term scientist.JOURNAL, 1962, Scientist: The story of a word,weblink Annals of Science, 18, 2, 65–85, 10.1080/00033796200202722, harv, Ross, Sydney, 2011-03-08, To be exact, the person who coined the term scientist was referred to in Whewell 1834 only as "some ingenious gentleman." Ross added a comment that this "some ingenious gentleman" was Whewell himself, without giving the reason for the identification. Ross 1962, p. 72. When Charles Darwin published On the Origin of Species he established evolution as the prevailing explanation of biological complexity. His theory of natural selection provided a natural explanation of how species originated, but this only gained wide acceptance a century later.The laws of conservation of energy, conservation of momentum and conservation of mass suggested a highly stable universe where there could be little loss of resources. With the advent of the steam engine and the industrial revolution, there was, however, an increased understanding that all forms of energy as defined in physics were not equally useful: they did not have the same energy quality. This realization led to the development of the laws of thermodynamics, in which the free energy of the universe is seen as constantly declining: the entropy of a closed universe increases over time.The electromagnetic theory was also established in the 19th century, and raised new questions which could not easily be answered using Newton's framework. The phenomena that would allow the deconstruction of the atom were discovered in the last decade of the 19th century: the discovery of X-rays inspired the discovery of radioactivity. In the next year came the discovery of the first subatomic particle, the electron.

20th century

File:DNA animation.gif|thumb|right|The DNA double helix is a molecule that encodes the genetic instructions used in the development and functioning of all known living organisms and many virusvirusEinstein's theory of relativity and the development of quantum mechanics led to the replacement of classical mechanics with a new physics which contains two parts that describe different types of events in nature.In the first half of the century, the development of antibiotics and artificial fertilizer made global human population growth possible. At the same time, the structure of the atom and its nucleus was discovered, leading to the release of "atomic energy" (nuclear power). In addition, the extensive use of technological innovation stimulated by the wars of this century led to revolutions in transportation (automobiles and aircraft), the development of ICBMs, a space race, and a nuclear arms race.The molecular structure of DNA was discovered in 1953. The discovery of the cosmic microwave background radiation in 1964 led to a rejection of the Steady State theory of the universe in favour of the Big Bang theory of Georges Lemaître.The development of spaceflight in the second half of the century allowed the first astronomical measurements done on or near other objects in space, including manned landings on the Moon. Space telescopes lead to numerous discoveries in astronomy and cosmology.Widespread use of integrated circuits in the last quarter of the 20th century combined with communications satellites led to a revolution in information technology and the rise of the global internet and mobile computing, including smartphones. The need for mass systematization of long, intertwined causal chains and large amounts of data led to the rise of the fields of systems theory and computer-assisted scientific modelling, which are partly based on the Aristotelian paradigm.JOURNAL, 10.2307/255139, 255139, The History and Status of General Systems Theory, The Academy of Management Journal, 15, 4, 407–26, von Bertalanffy, Ludwig, 1972, Harmful environmental issues such as ozone depletion, acidification, eutrophication and climate change came to the public's attention in the same period, and caused the onset of environmental science and environmental technology.

21st century

File:CMS Higgs-event.jpg|thumb|upright=0.80|A simulated event in the CMS detector of the Large Hadron Collider, featuring a possible appearance of the Higgs bosonHiggs bosonThe Human Genome Project was completed in 2003, determining the sequence of nucleotide base pairs that make up human DNA, and identifying and mapping all of the genes of the human genome.JOURNAL, Naidoo, Nasheen, Pawitan, Yudi, Soong, Richie, Cooper, David N., Ku, Chee-Seng, October 2011, Human genetics and genomics a decade after the release of the draft sequence of the human genome, Human Genomics, 5, 6, 577–622, 10.1186/1479-7364-5-6-577, 3525251, 22155605, Induced pluripotent stem cells were developed in 2006, a technology allowing adult cells to be transformed into stem cells capable of giving rise to any cell type found in the body, potentially of huge importance to the field of regenerative medicine.JOURNAL, Rashid, S. Tamir, Alexander, Graeme J.M., March 2013, Induced pluripotent stem cells: from Nobel Prizes to clinical applications, Journal of Hepatology, 58, 3, 625–629, 10.1016/j.jhep.2012.10.026, 1600-0641, 23131523, With the discovery of the Higgs boson in 2012, the last particle predicted by the Standard Model of particle physics was found. In 2015, gravitational waves, predicted by general relativity a century before, were first observed.JOURNAL, 10.3847/2041-8213/aa91c9, Multi-messenger Observations of a Binary Neutron Star Merger, The Astrophysical Journal, 848, 2, L12, 2017, Abbott, B.P., Abbott, R., Abbott, T.D., Acernese, F., Ackley, K., Adams, C., Adams, T., Addesso, P., Adhikari, R.X., Adya, V.B., Affeldt, C., Afrough, M., Agarwal, B., Agathos, M., Agatsuma, K., Aggarwal, N., Aguiar, O.D., Aiello, L., Ain, A., Ajith, P., Allen, B., Allen, G., Allocca, A., Altin, P.A., Amato, A., Ananyeva, A., Anderson, S.B., Anderson, W.G., Angelova, S.V., Antier, S., 29, 2017ApJ...848L..12A, 1710.05833, JOURNAL, 10.1126/science.aar2149, Merging neutron stars generate gravitational waves and a celestial light show, Science, 2017, Cho, Adrian,

Branches of science

Modern science is commonly divided into three major branches that consist of the natural sciences, social sciences, and formal sciences. Each of these branches comprise various specialized yet overlapping scientific disciplines that often possess their own nomenclature and expertise.WEB,weblink Scientific Method: Relationships Among Scientific Paradigms, March 7, 2007, Seed Magazine, November 4, 2016, dead,weblink" title="">weblink November 1, 2016, mdy-all, Both natural and social sciences are empirical sciencesBOOK, Philosophy of Science: From Problem to Theory, Bunge, Mario Augusto, 1998, Transaction Publishers, 978-0-7658-0413-6, 24, as their knowledge are based on empirical observations and are capable of being tested for its validity by other researchers working under the same conditions.BOOK, Popper, Karl R., 2002a, A survey of some fundamental problems, The Logic of Scientific Discovery, 1959, 3–26, Routledge Classics, New York, New York, 978-0-415-27844-7, 59377149, There are also closely related disciplines that use science, such as engineering and medicine, which are sometimes described as applied sciences. The relationships between the branches of science are summarized by the following table.{|class="wikitable"
!rowspan=2|Formal science!colspan=2|Empirical sciences
!Natural science!Social science
!Foundation|Logic; Mathematics; Statistics|Physics; Chemistry; Biology; Earth science; Space science|Economics; Political science; Sociology; Psychology
!Application|Computer science|Engineering; Agricultural science; Medicine; Dentistry; Pharmacy|Business administration; Jurisprudence; Pedagogy

Natural science

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- Seawifs global biosphere.jpg -
False-color composite of global oceanic and terrestrial photoautotroph abundance by the SeaWiFS Project, NASA/Goddard Space Flight Center, and ORBIMAGE.
Natural science is concerned with the description, prediction, and understanding of natural phenomena based on empirical evidence from observation and experimentation. It can be divided into two main branches: life science (or biological science) and physical science. Physical science is subdivided into branches, including physics, chemistry, astronomy and earth science. These two branches may be further divided into more specialized disciplines. Modern natural science is the successor to the natural philosophy that began in Ancient Greece. Galileo, Descartes, Bacon, and Newton debated the benefits of using approaches which were more mathematical and more experimental in a methodical way. Still, philosophical perspectives, conjectures, and presuppositions, often overlooked, remain necessary in natural science.BOOK, Gauch Jr., Hugh G., Science in perspective, Scientific Method in Practice, Cambridge University Press, Cambridge, United Kingdom,weblink 21–73, 978-0-52-101708-4, 2003, Systematic data collection, including discovery science, succeeded natural history, which emerged in the 16th century by describing and classifying plants, animals, minerals, and so on.BOOK, Oglivie, Brian W., 2008, Introduction, The Science of Describing: Natural History in Renaissance Europe, 1–24, Paperback, University of Chicago Press, Chicago, Illinois, 978-0-226-62088-6, Today, "natural history" suggests observational descriptions aimed at popular audiences.WEB, Natural History,weblink Princeton University WordNet, October 21, 2012, live,weblink" title="">weblink March 3, 2012,

Social science

File:Supply-demand-right-shift-demand.svg|thumb|right|In economics, the supply and demandsupply and demandSocial science is concerned with society and the relationships among individuals within a society. It has many branches that include, but are not limited to, anthropology, archaeology, communication studies, economics, history, human geography, jurisprudence, linguistics, political science, psychology, public health, and sociology. Social scientists may adopt various philosophical theories to study individuals and society. For example, positivist social scientists use methods resembling those of the natural sciences as tools for understanding society, and so define science in its stricter modern sense. Interpretivist social scientists, by contrast, may use social critique or symbolic interpretation rather than constructing empirically falsifiable theories, and thus treat science in its broader sense. In modern academic practice, researchers are often eclectic, using multiple methodologies (for instance, by combining both quantitative and qualitative research). The term "social research" has also acquired a degree of autonomy as practitioners from various disciplines share in its aims and methods.

Formal science

Formal science is involved in the study of formal systems. It includes mathematics,BOOK, Tomalin, Marcus, 2006, Linguistics and the Formal Sciences, 10.2277/0521854814, JOURNAL, The Formal Sciences: Their Scope, Their Foundations, and Their Unity, Synthese, 133, 5–11, 10.1023/a:1020887832028, 2002, Löwe, Benedikt, systems theory, and theoretical computer science. The formal sciences share similarities with the other two branches by relying on objective, careful, and systematic study of an area of knowledge. They are, however, different from the empirical sciences as they rely exclusively on deductive reasoning, without the need for empirical evidence, to verify their abstract concepts.{{Citation |first=Thompson | last = Bill |title=The Nature of Statistical Evidence |chapter=2.4 Formal Science and Applied Mathematics |publisher=Springer |series=Lecture Notes in Statistics |volume=189 |edition=1st |year=2007 |page=15}} The formal sciences are therefore a priori disciplines and because of this, there is disagreement on whether they actually constitute a science. Nevertheless, the formal sciences play an important role in the empirical sciences. Calculus, for example, was initially invented to understand motion in physics.BOOK, Mujumdar, Anshu Gupta, Singh, Tejinder, 2016, Cognitive science and the connection between physics and mathematics, Trick or Truth?: The Mysterious Connection Between Physics and Mathematics, Anthony Aguirre, Brendan Foster, 1st, The Frontiers Collection, 201–218, Switzerland, SpringerNature, 978-3-319-27494-2, Natural and social sciences that rely heavily on mathematical applications include mathematical physics, mathematical chemistry, mathematical biology, mathematical finance, and mathematical economics.

Scientific research

{{See also|Research}}Scientific research can be labeled as either basic or applied research. Basic research is the search for knowledge and applied research is the search for solutions to practical problems using this knowledge. Although some scientific research is applied research into specific problems, a great deal of our understanding comes from the curiosity-driven undertaking of basic research. This leads to options for technological advance that were not planned or sometimes even imaginable. This point was made by Michael Faraday when allegedly in response to the question "what is the use of basic research?" he responded: "Sir, what is the use of a new-born child?".WEB,weblinkweblink" title="">weblink January 19, 2012, To Live at All Is Miracle Enough, Richard Dawkins,, May 10, 2006, February 5, 2012, For example, research into the effects of red light on the human eye's rod cells did not seem to have any practical purpose; eventually, the discovery that our night vision is not troubled by red light would lead search and rescue teams (among others) to adopt red light in the cockpits of jets and helicopters.BOOK, Stanovich, Keith E., 2007, How to Think Straight About Psychology, Boston, Pearson Education, 106–147, 978-0-205-68590-5, Finally, even basic research can take unexpected turns, and there is some sense in which the scientific method is built to harness luck.

Scientific method

File:IRAS 10082-5647.jpg|thumb|upright=1.0|The central star IRAS 10082-5647 was captured by the Advanced Camera for Surveys aboard the Hubble Space TelescopeHubble Space TelescopeScientific research involves using the scientific method, which seeks to objectively explain the events of nature in a reproducible way."The amazing point is that for the first time since the discovery of mathematics, a method has been introduced, the results of which have an intersubjective value!" (Author's punctuation)}} —BOOK, di Francia, Giuliano Toraldo, The method of physics, The Investigation of the Physical World, Cambridge, United Kingdom, Cambridge University Press, 1976, 1–52, 978-0-521-29925-1, An explanatory thought experiment or hypothesis is put forward as explanation using principles such as parsimony (also known as "Occam's Razor") and are generally expected to seek consilience â€“ fitting well with other accepted facts related to the phenomena.BOOK, Wilson, Edward, Consilience: The Unity of Knowledge, Vintage, New York, 1999, 978-0-679-76867-8, harv, This new explanation is used to make falsifiable predictions that are testable by experiment or observation. The predictions are to be posted before a confirming experiment or observation is sought, as proof that no tampering has occurred. Disproof of a prediction is evidence of progress.{{efn|{{harvnb|di Francia|1976|pp=4–5}}: "One learns in a laboratory; one learns how to make experiments only by experimenting, and one learns how to work with his hands only by using them. The first and fundamental form of experimentation in physics is to teach young people to work with their hands. Then they should be taken into a laboratory and taught to work with measuring instruments â€“ each student carrying out real experiments in physics. This form of teaching is indispensable and cannot be read in a book."}}{{efn|{{harvnb|Fara|2009|p=204}}: "Whatever their discipline, scientists claimed to share a common scientific method that ... distinguished them from non-scientists."}}BOOK, Fara, Patricia, 2009, Decisions, Science: A Four Thousand Year History, Oxford, United Kingdom, Oxford University Press, 978-0-19-922689-4, 408,weblink This is done partly through observation of natural phenomena, but also through experimentation that tries to simulate natural events under controlled conditions as appropriate to the discipline (in the observational sciences, such as astronomy or geology, a predicted observation might take the place of a controlled experiment). Experimentation is especially important in science to help establish causal relationships (to avoid the correlation fallacy).When a hypothesis proves unsatisfactory, it is either modified or discarded.BOOK, Nola, Robert, Irzik, Gürol, 2005k, naive inductivism as a methodology in science, Philosophy, science, education and culture, 28, Science & technology education library, 978-1-4020-3769-6, Springer, 207–230, If the hypothesis survived testing, it may become adopted into the framework of a scientific theory, a logically reasoned, self-consistent model or framework for describing the behavior of certain natural phenomena. A theory typically describes the behavior of much broader sets of phenomena than a hypothesis; commonly, a large number of hypotheses can be logically bound together by a single theory. Thus a theory is a hypothesis explaining various other hypotheses. In that vein, theories are formulated according to most of the same scientific principles as hypotheses. In addition to testing hypotheses, scientists may also generate a model, an attempt to describe or depict the phenomenon in terms of a logical, physical or mathematical representation and to generate new hypotheses that can be tested, based on observable phenomena.BOOK, Nola, Robert, Irzik, Gürol, 2005j, The aims of science and critical inquiry, Philosophy, science, education and culture, 28, Science & technology education library, 978-1-4020-3769-6, Springer, 207–230, While performing experiments to test hypotheses, scientists may have a preference for one outcome over another, and so it is important to ensure that science as a whole can eliminate this bias.WEB, van Gelder, Tim, 1999,weblink "Heads I win, tails you lose": A Foray Into the Psychology of Philosophy, University of Melbourne, March 28, 2008,weblink" title="">weblink April 9, 2008, WEB, Pease, Craig, September 6, 2006,weblink" title="">weblink June 19, 2010, Chapter 23. Deliberate bias: Conflict creates bad science, Science for Business, Law and Journalism, Vermont Law School,weblink This can be achieved by careful experimental design, transparency, and a thorough peer review process of the experimental results as well as any conclusions.BOOK, David, Shatz, 2004, Peer Review: A Critical Inquiry, Rowman & Littlefield, 978-0-7425-1434-8, 54989960, BOOK, Sheldon, Krimsky, 2003, Science in the Private Interest: Has the Lure of Profits Corrupted the Virtue of Biomedical Research, Rowman & Littlefield, 978-0-7425-1479-9, 185926306,weblink After the results of an experiment are announced or published, it is normal practice for independent researchers to double-check how the research was performed, and to follow up by performing similar experiments to determine how dependable the results might be.BOOK, Ruth Ellen, Bulger, 2002, Heitman, Elizabeth, Reiser, Stanley Joel, The Ethical Dimensions of the Biological and Health Sciences, 2nd, 978-0-521-00886-0, Cambridge University Press, 47791316, Taken in its entirety, the scientific method allows for highly creative problem solving while minimizing any effects of subjective bias on the part of its users (especially the confirmation bias).WEB, Backer, Patricia Ryaby, October 29, 2004,weblink What is the scientific method?, San Jose State University, March 28, 2008, dead,weblink" title="">weblink April 8, 2008,


John Ziman points out that intersubjective verifiability is fundamental to the creation of all scientific knowledge.BOOK, John, Ziman, 1978c, Common observation, Reliable knowledge: An exploration of the grounds for belief in science, 42–76, Cambridge, Cambridge University Press, 978-0-521-22087-3, Ziman shows how scientists can identify patterns to each other across centuries; he refers to this ability as "perceptual consensibility." He then makes consensibility, leading to consensus, the touchstone of reliable knowledge.BOOK, John, Ziman, 1978c, The stuff of reality, Reliable knowledge: An exploration of the grounds for belief in science, 95–123, Cambridge, Cambridge University Press, 978-0-521-22087-3,

Role of mathematics

(File:Integral as region under curve.svg|thumb|right|Calculus, the mathematics of continuous change, underpins many of the sciences.)Mathematics is essential in the formation of hypotheses, theories, and lawsBOOK, Popper, Karl R., 2002e, The problem of the empirical basis, The Logic of Scientific Discovery, 1959, 3–26, Routledge Classics, New York, New York, 978-0-415-27844-7, 59377149, in the natural and social sciences. For example, it is used in quantitative scientific modeling, which can generate new hypotheses and predictions to be tested. It is also used extensively in observing and collecting measurements. Statistics, a branch of mathematics, is used to summarize and analyze data, which allow scientists to assess the reliability and variability of their experimental results.Computational science applies computing power to simulate real-world situations, enabling a better understanding of scientific problems than formal mathematics alone can achieve. According to the Society for Industrial and Applied Mathematics, computation is now as important as theory and experiment in advancing scientific knowledge.WEB,weblink SIAM: Graduate Education for Computational Science and Engineering, Society for Industrial and Applied Mathematics, November 4, 2016, live,weblink December 28, 2016, mdy-all,

Philosophy of science

{{See also|Philosophy of science}}File:JohnLocke.png|thumb|English philosopher and physician John LockeJohn LockeScientists usually take for granted a set of basic assumptions that are needed to justify the scientific method: (1) that there is an objective reality shared by all rational observers; (2) that this objective reality is governed by natural laws; (3) that these laws can be discovered by means of systematic observation and experimentation. Philosophy of science seeks a deep understanding of what these underlying assumptions mean and whether they are valid.The belief that scientific theories should and do represent metaphysical reality is known as realism. It can be contrasted with anti-realism, the view that the success of science does not depend on it being accurate about unobservable entities such as electrons. One form of anti-realism is idealism, the belief that the mind or consciousness is the most basic essence, and that each mind generates its own reality.{{efn|This realization is the topic of intersubjective verifiability, as recounted, for example, by Max Born (1949, 1965) Natural Philosophy of Cause and Chance, who points out that all knowledge, including natural or social science, is also subjective. p. 162: "Thus it dawned upon me that fundamentally everything is subjective, everything without exception. That was a shock."}} In an idealistic world view, what is true for one mind need not be true for other minds.There are different schools of thought in philosophy of science. The most popular position is empiricism,{{efn|name= Galileo1638|In his investigation of the law of falling bodies, Galileo (1638) serves as example for scientific investigation: Two New Sciences "A piece of wooden moulding or scantling, about 12 cubits long, half a cubit wide, and three finger-breadths thick, was taken; on its edge was cut a channel a little more than one finger in breadth; having made this groove very straight, smooth, and polished, and having lined it with parchment, also as smooth and polished as possible, we rolled along it a hard, smooth, and very round bronze ball. Having placed this board in a sloping position, by lifting one end some one or two cubits above the other, we rolled the ball, as I was just saying, along the channel, noting, in a manner presently to be described, the time required to make the descent. We ... now rolled the ball only one-quarter the length of the channel; and having measured the time of its descent, we found it precisely one-half of the former. Next we tried other distances, comparing the time for the whole length with that for the half, or with that for two-thirds, or three-fourths, or indeed for any fraction; in such experiments, repeated many, many, times." Galileo solved the problem of time measurement by weighing a jet of water collected during the descent of the bronze ball, as stated in his Two New Sciences.}} which holds that knowledge is created by a process involving observation and that scientific theories are the result of generalizations from such observations.BOOK, Godfrey-Smith, Peter, 2003c, Induction and confirmation, Theory and Reality: An Introduction to the Philosophy of Science, 1st, University of Chicago, 978-0-226-30062-7, 39–56, Chicago, Illinois, Empiricism generally encompasses inductivism, a position that tries to explain the way general theories can be justified by the finite number of observations humans can make and hence the finite amount of empirical evidence available to confirm scientific theories. This is necessary because the number of predictions those theories make is infinite, which means that they cannot be known from the finite amount of evidence using deductive logic only. Many versions of empiricism exist, with the predominant ones being BayesianismBOOK, Godfrey-Smith, Peter, 2003o, Empiricism, naturalism, and scientific realism?, Theory and Reality: An Introduction to the Philosophy of Science, 1st, University of Chicago, 978-0-226-30062-7, 219–232, Chicago, Illinois, and the hypothetico-deductive method.File:Karl Popper2.jpg|left|thumb|The Austrian-British philosopher of science Karl Popper (1902–1994) in 1990. He is best known for his work on empirical falsification.]]Empiricism has stood in contrast to rationalism, the position originally associated with Descartes, which holds that knowledge is created by the human intellect, not by observation.BOOK, Godfrey-Smith, Peter, 2003b, Logic plus empiricism, Theory and Reality: An Introduction to the Philosophy of Science, 1st, University of Chicago, 978-0-226-30062-7, 19–38, Chicago, Illinois, Critical rationalism is a contrasting 20th-century approach to science, first defined by Austrian-British philosopher Karl Popper. Popper rejected the way that empiricism describes the connection between theory and observation. He claimed that theories are not generated by observation, but that observation is made in the light of theories and that the only way a theory can be affected by observation is when it comes in conflict with it.BOOK, Godfrey-Smith, Peter, 2003d, Popper: Conjecture and refutation, Theory and Reality: An Introduction to the Philosophy of Science, 1st, University of Chicago, 978-0-226-30062-7, 57–74, Chicago, Illinois, Popper proposed replacing verifiability with falsifiability as the landmark of scientific theories and replacing induction with falsification as the empirical method. Popper further claimed that there is actually only one universal method, not specific to science: the negative method of criticism, trial and error.BOOK, Godfrey-Smith, Peter, 2003g, Lakatos, Laudan, Feyerabend, and frameworks, Theory and Reality: An Introduction to the Philosophy of Science, 1st, University of Chicago, 978-0-226-30062-7, 102–121, Chicago, Illinois, It covers all products of the human mind, including science, mathematics, philosophy, and art.BOOK, Objective Knowledge, Popper, Karl, 1972, Another approach, instrumentalism, colloquially termed "shut up and multiply,"WEB,weblink Shut up and multiply, September 13, 2015, LessWrong Wiki, November 4, 2016, live,weblink October 19, 2016, mdy-all, emphasizes the utility of theories as instruments for explaining and predicting phenomena.BOOK, The Rationality of Science,weblink registration, Newton-Smith, W.H., London, Routledge, 1994, 30, 978-0-7100-0913-5, It views scientific theories as black boxes with only their input (initial conditions) and output (predictions) being relevant. Consequences, theoretical entities, and logical structure are claimed to be something that should simply be ignored and that scientists shouldn't make a fuss about (see interpretations of quantum mechanics). Close to instrumentalism is constructive empiricism, according to which the main criterion for the success of a scientific theory is whether what it says about observable entities is true.Thomas Kuhn argued that the process of observation and evaluation takes place within a paradigm, a logically consistent "portrait" of the world that is consistent with observations made from its framing. He characterized normal science as the process of observation and "puzzle solving" which takes place within a paradigm, whereas revolutionary science occurs when one paradigm overtakes another in a paradigm shift.JOURNAL,weblink Thomas Kuhn, 2015-10-26, Bird, Alexander, 2013, Stanford Encyclopedia of Philosophy, Zalta, Edward N., Each paradigm has its own distinct questions, aims, and interpretations. The choice between paradigms involves setting two or more "portraits" against the world and deciding which likeness is most promising. A paradigm shift occurs when a significant number of observational anomalies arise in the old paradigm and a new paradigm makes sense of them. That is, the choice of a new paradigm is based on observations, even though those observations are made against the background of the old paradigm. For Kuhn, acceptance or rejection of a paradigm is a social process as much as a logical process. Kuhn's position, however, is not one of relativism.T.S. Kuhn, The Structure of Scientific Revolutions, 2nd. ed., Chicago: Univ. of Chicago Pr., 1970, p. 206. {{ISBN|0-226-45804-0}}Finally, another approach often cited in debates of scientific skepticism against controversial movements like "creation science" is methodological naturalism. Its main point is that a difference between natural and supernatural explanations should be made and that science should be restricted methodologically to natural explanations.BOOK, Godfrey-Smith, Peter, 2003j, Naturalistic philosophy in theory and practice, Theory and Reality: An Introduction to the Philosophy of Science, 1st, University of Chicago, 978-0-226-30062-7, 149–162, Chicago, Illinois, {{efn|credits Willard Van Orman Quine (1969) "Epistemology Naturalized" Ontological Relativity and Other Essays New York: Columbia University Press, as well as John Dewey, with the basic ideas of naturalism â€“ Naturalized Epistemology, but Godfrey-Smith diverges from Quine's position: according to Godfrey-Smith, "A naturalist can think that science can contribute to answers to philosophical questions, without thinking that philosophical questions can be replaced by science questions.".}} That the restriction is merely methodological (rather than ontological) means that science should not consider supernatural explanations itself, but should not claim them to be wrong either. Instead, supernatural explanations should be left a matter of personal belief outside the scope of science. Methodological naturalism maintains that proper science requires strict adherence to empirical study and independent verification as a process for properly developing and evaluating explanations for observable phenomena.JOURNAL, The Review of Metaphysics, Casebeer, William D. Natural Ethical Facts: Evolution, Connectionism, and Moral Cognition, Brugger, E. Christian, 58, 2, 2004, harv, The absence of these standards, arguments from authority, biased observational studies and other common fallacies are frequently cited by supporters of methodological naturalism as characteristic of the non-science they criticize.

Certainty and science

A scientific theory is empirical{{efn|name= Galileo1638}}WEB,weblink The Structure of Scientific Theories, Winther, Rasmus Grønfeldt, 2015, Stanford Encyclopedia of Philosophy, November 4, 2016, and is always open to falsification if new evidence is presented. That is, no theory is ever considered strictly certain as science accepts the concept of fallibilism.{{efn|"No amount of experimentation can ever prove me right; a single experiment can prove me wrong." â€”Albert Einstein, noted by Alice Calaprice (ed. 2005) The New Quotable Einstein Princeton University Press and Hebrew University of Jerusalem, {{ISBN|0-691-12074-9}} p. 291. Calaprice denotes this not as an exact quotation, but as a paraphrase of a translation of A. Einstein's "Induction and Deduction". Collected Papers of Albert Einstein 7 Document 28. Volume 7 is The Berlin Years: Writings, 1918–1921. A. Einstein; M. Janssen, R. Schulmann, et al., eds.}} The philosopher of science Karl Popper sharply distinguished truth from certainty. He wrote that scientific knowledge "consists in the search for truth," but it "is not the search for certainty ... All human knowledge is fallible and therefore uncertain.BOOK, Popper, Karl Raimund, 1996, In Search of a Better World: Lectures and Essays From Thirty Years,weblink registration, Routledge, New York, New York, 978-0-415-13548-1, New scientific knowledge rarely results in vast changes in our understanding. According to psychologist Keith Stanovich, it may be the media's overuse of words like "breakthrough" that leads the public to imagine that science is constantly proving everything it thought was true to be false. While there are such famous cases as the theory of relativity that required a complete reconceptualization, these are extreme exceptions. Knowledge in science is gained by a gradual synthesis of information from different experiments by various researchers across different branches of science; it is more like a climb than a leap. Theories vary in the extent to which they have been tested and verified, as well as their acceptance in the scientific community.{{efn|BOOK, Fleck, Ludwik, Ludwik Fleck, Thaddeus J., Trenn, Robert K, Merton, Genesis and Development of a Scientific Fact, 1979, University of Chicago Press, Chicago, 978-0-226-25325-1, Claims that before a specific fact "existed", it had to be created as part of a social agreement within a community. Steven Shapin (1980) "A view of scientific thought" Science ccvii (Mar 7, 1980) 1065–66 states "[To Fleck,] facts are invented, not discovered. Moreover, the appearance of scientific facts as discovered things is itself a social construction: a made thing. "}} For example, heliocentric theory, the theory of evolution, relativity theory, and germ theory still bear the name "theory" even though, in practice, they are considered factual.NEWS,weblink London, The Guardian, One side can be wrong, Richard, Dawkins, Jerry, Coyne, September 2, 2005, live,weblink" title="">weblink December 26, 2013, mdy-all, Philosopher Barry Stroud adds that, although the best definition for "knowledge" is contested, being skeptical and entertaining the possibility that one is incorrect is compatible with being correct. Therefore, scientists adhering to proper scientific approaches will doubt themselves even once they possess the truth.WEB,weblink Barry Stroud on Scepticism, philosophy bites, December 16, 2007, February 5, 2012, live,weblink" title="">weblink January 23, 2012, mdy-all, The fallibilist C. S. Peirce argued that inquiry is the struggle to resolve actual doubt and that merely quarrelsome, verbal, or hyperbolic doubt is fruitlessPeirce (1877), "The Fixation of Belief", Popular Science Monthly, v. 12, pp. 1–15, see §IV on pp. 6–7 {{webarchive|url= |date=April 15, 2016 }}. Reprinted Collected Papers v. 5, paragraphs 358–87 (see 374–76), Writings v. 3, pp. 242–57 (see 247–48), Essential Peirce v. 1, pp. 109–23 (see 114–15), and elsewhere. â€“ but also that the inquirer should try to attain genuine doubt rather than resting uncritically on common sense.Peirce (1905), "Issues of Pragmaticism", The Monist, v. XV, n. 4, pp. 481–99, see "Character V" on p. 491. Reprinted in Collected Papers v. 5, paragraphs 438–63 (see 451), Essential Peirce v. 2, pp. 346–59 (see 353), and elsewhere. He held that the successful sciences trust not to any single chain of inference (no stronger than its weakest link) but to the cable of multiple and various arguments intimately connected.Peirce (1868), "Some Consequences of Four Incapacities", Journal of Speculative Philosophy v. 2, n. 3, pp. 140–57, see p. 141 {{webarchive|url=weblink |date= April 15, 2016 }}. Reprinted in Collected Papers, v. 5, paragraphs 264–317, Writings v. 2, pp. 211–42, Essential Peirce v. 1, pp. 28–55, and elsewhere.Stanovich also asserts that science avoids searching for a "magic bullet"; it avoids the single-cause fallacy. This means a scientist would not ask merely "What is the cause of ...", but rather "What are the most significant causes of ...". This is especially the case in the more macroscopic fields of science (e.g. psychology, physical cosmology). Research often analyzes few factors at once, but these are always added to the long list of factors that are most important to consider. For example, knowing the details of only a person's genetics, or their history and upbringing, or the current situation may not explain a behavior, but a deep understanding of all these variables combined can be very predictive.

Scientific literature

File:Science Vol. 1 (1880).jpg|thumb|right|Cover of the first volume of the scientific journal Science in 1880.]]Scientific research is published in an enormous range of scientific literature.JOURNAL, John Ziman, Ziman, J.M., Science, The proliferation of scientific literature: a natural process, 1980, 208, 4442, 369–71, 10.1126/science.7367863, 7367863, harv, 1980Sci...208..369Z, Scientific journals communicate and document the results of research carried out in universities and various other research institutions, serving as an archival record of science. The first scientific journals, Journal des Sçavans followed by the Philosophical Transactions, began publication in 1665. Since that time the total number of active periodicals has steadily increased. In 1981, one estimate for the number of scientific and technical journals in publication was 11,500.BOOK, Krishna, Subramanyam, Subramanyam, Bhadriraju, 1981, Scientific and Technical Information Resources, CRC Press, 978-0-8247-8297-9, 232950234, The United States National Library of Medicine currently indexes 5,516 journals that contain articles on topics related to the life sciences. Although the journals are in 39 languages, 91 percent of the indexed articles are published in English.WEB,weblink MEDLINE Fact Sheet, United States National Library of Medicine, Washington DC, October 15, 2011, live,weblink" title="">weblink October 16, 2011, mdy-all, Most scientific journals cover a single scientific field and publish the research within that field; the research is normally expressed in the form of a scientific paper. Science has become so pervasive in modern societies that it is generally considered necessary to communicate the achievements, news, and ambitions of scientists to a wider populace.Science magazines such as New Scientist, Science & Vie, and Scientific American cater to the needs of a much wider readership and provide a non-technical summary of popular areas of research, including notable discoveries and advances in certain fields of research. Science books engage the interest of many more people. Tangentially, the science fiction genre, primarily fantastic in nature, engages the public imagination and transmits the ideas, if not the methods, of science.Recent efforts to intensify or develop links between science and non-scientific disciplines such as literature or more specifically, poetry, include the Creative Writing Science resource developed through the Royal Literary Fund.WEB, Mario, Petrucci,weblink Creative Writing â€“ Science, April 27, 2008, dead,weblink" title="">weblink January 6, 2009, mdy-all,

Practical impacts

Discoveries in fundamental science can be world-changing. For example:
{| class="wikitable" style="font-size:90%"! Research !! Impact
Static electricity and magnetism (c. 1600)Electric current (18th century) >| All electric appliances, dynamos, electric power stations, modern electronics, including electric lighting, television, electric heating, transcranial magnetic stimulation, deep brain stimulation, magnetic tape, loudspeaker, and the compass and lightning rod.
Diffraction (1665) >Optics, hence fiber optic cable (1840s), modern submarine communications cable>intercontinental communications, and cable TV and internet.
Germ theory of disease>Germ theory (1700) Hygiene, leading to decreased transmission of infectious diseases; Antibody, leading to techniques for disease diagnosis and Targeted therapy>targeted anticancer therapies.
Vaccination (1798) >| Leading to the elimination of most infectious diseases from developed countries and the worldwide eradication of smallpox.
Photovoltaic effect (1839) >| Solar cells (1883), hence solar power, solar powered watches, calculators and other devices.
The strange orbit of Mercury (planet) (1859) and other research}}leading to special relativity>special (1905) and general relativity (1916) Satellite-based technology such as GPS (1973), satnav and satellite communications.{{efnEvicting Einstein, March 26, 2004, NASA. "Both [relativity and quantum mechanics] are extremely successful. The Global Positioning System (GPS), for instance, wouldn't be possible without the theory of relativity. Computers, telecommunications, and the Internet, meanwhile, are spin-offs of quantum mechanics."}}
Radio waves (1887) >telephony, and broadcasting>broadcast television (1927) and radio station (1906) entertainment. Other uses included â€“ emergency services, radar (navigation and weather prediction), medicine, radio astronomy>astronomy, wireless communications, geophysics, and networking. Radio waves also led researchers to adjacent frequencies such as microwaves, used worldwide for heating and cooking food.
Radioactivity (1896) and antimatter (1932) >Cancer treatment (1896), Radiometric dating (1905), nuclear reactors (1942) and Nuclear weapon>weapons (1945), mineral exploration, PET scans (1961), and medical research (via isotopic labeling).
X-rays (1896)>| Medical imaging, including computed tomography.
Crystallography and quantum mechanics (1900) >Semiconductor devices (1906), hence modern computing and telecommunications including the integration with wireless devices: the mobile phone,{{efn>name=nasa2004}} LED lamps and lasers.
Plastics (1907)>|Starting with Bakelite, many types of artificial polymers for numerous applications in industry and daily life.
Antibiotics (1880s, 1928) >| Salvarsan, Penicillin, doxycycline etc.
Nuclear magnetic resonance (1930s) >| Nuclear magnetic resonance spectroscopy (1946), magnetic resonance imaging (1971), functional magnetic resonance imaging (1990s).


Replication crisis

{{Further|Replication crisis|Metascience}}The replication crisis is an ongoing methodological crisis primarily affecting parts of the social and life sciences in which scholars have found that the results of many scientific studies are difficult or impossible to replicate or reproduce on subsequent investigation, either by independent researchers or by the original researchers themselves.JOURNAL, 10.1038/515009a, Metascience could rescue the 'replication crisis', Nature, 515, 7525, 9, 2014, Schooler, J. W., 25373639, 2014Natur.515....9S, WEB, Smith, Noah, Why 'Statistical Significance' Is Often Insignificant,weblink Bloomberg, 7 November 2017, The crisis has long-standing roots; the phrase was coined in the early 2010sJOURNAL, 10.1177/1745691612465253, Editors' Introduction to the Special Section on Replicability in Psychological Science: A Crisis of Confidence?, Perspectives on Psychological Science, 7, 6, 528–530, 2012, Pashler, Harold, Wagenmakers, Eric Jan, 26168108, as part of a growing awareness of the problem. The replication crisis represents an important body of research in metascience, which aims to improve the quality of all scientific research while reducing waste.JOURNAL, Ioannidis, John P. A., Fanelli, Daniele, Dunne, Debbie Drake, Goodman, Steven N., 2015-10-02, Meta-research: Evaluation and Improvement of Research Methods and Practices, PLOS Biology, 13, 10, –1002264, 10.1371/journal.pbio.1002264, 26431313, 4592065, 1545-7885,

Fringe science, pseudoscience, and junk science

An area of study or speculation that masquerades as science in an attempt to claim a legitimacy that it would not otherwise be able to achieve is sometimes referred to as pseudoscience, fringe science, or junk science.{{efn|"Pseudoscientific â€“ pretending to be scientific, falsely represented as being scientific", from the Oxford American Dictionary, published by the Oxford English Dictionary; Hansson, Sven Ove (1996)."Defining Pseudoscience", Philosophia Naturalis, 33: 169–76, as cited in "Science and Pseudo-science" (2008) in Stanford Encyclopedia of Philosophy. The Stanford article states: "Many writers on pseudoscience have emphasized that pseudoscience is non-science posing as science. The foremost modern classic on the subject (Gardner 1957) bears the title Fads and Fallacies in the Name of Science. According to Brian Baigrie (1988, 438), "[w]hat is objectionable about these beliefs is that they masquerade as genuinely scientific ones." These and many other authors assume that to be pseudoscientific, an activity or a teaching has to satisfy the following two criteria (Hansson 1996): (1) it is not scientific, and (2) its major proponents try to create the impression that it is scientific".
  • For example, Hewitt et al. Conceptual Physical Science Addison Wesley; 3 edition (July 18, 2003) {{ISBN|0-321-05173-4}}, Bennett et al. The Cosmic Perspective 3e Addison Wesley; 3 edition (July 25, 2003) {{ISBN|0-8053-8738-2}}; See also, e.g., Gauch HG Jr. Scientific Method in Practice (2003).
  • A 2006 National Science Foundation report on Science and engineering indicators quoted Michael Shermer's (1997) definition of pseudoscience: '"claims presented so that they appear [to be] scientific even though they lack supporting evidence and plausibility" (p. 33). In contrast, science is "a set of methods designed to describe and interpret observed and inferred phenomena, past or present, and aimed at building a testable body of knowledge open to rejection or confirmation" (p. 17)'.BOOK, Shermer M., 1997, Why People Believe Weird Things: Pseudoscience, Superstition, and Other Confusions of Our Time, New York, W. H. Freeman and Company, 978-0-7167-3090-3, as cited by BOOK, National Science Board. National Science Foundation, Division of Science Resources Statistics, Science and engineering indicators 2006, Science and Technology: Public Attitudes and Understanding,weblink 2006, dead,weblink February 1, 2013,
  • "A pretended or spurious science; a collection of related beliefs about the world mistakenly regarded as being based on scientific method or as having the status that scientific truths now have," from the Oxford English Dictionary, second edition 1989.}} Physicist Richard Feynman coined the term "cargo cult science" for cases in which researchers believe they are doing science because their activities have the outward appearance of science but actually lack the "kind of utter honesty" that allows their results to be rigorously evaluated.WEB,weblink Cargo Cult Science, Feynman, Richard, 1974, Center for Theoretical Neuroscience, Columbia University,weblink" title="">weblink March 4, 2005, dead, November 4, 2016, Various types of commercial advertising, ranging from hype to fraud, may fall into these categories. Science has been described as "the most important tool" for separating valid claims from invalid ones.Novella, Steven, et al. The Skeptics' Guide to the Universe: How to Know What's Really Real in a World Increasingly Full of Fake. Grand Central Publishing, 2018. pp. 162.
There can also be an element of political or ideological bias on all sides of scientific debates. Sometimes, research may be characterized as "bad science," research that may be well-intended but is actually incorrect, obsolete, incomplete, or over-simplified expositions of scientific ideas. The term "scientific misconduct" refers to situations such as where researchers have intentionally misrepresented their published data or have purposely given credit for a discovery to the wrong person.JOURNAL, Coping with fraud, The COPE Report 1999, 11–18,weblinkweblink" title="">weblink It is 10 years, to the month, since Stephen Lock ... Reproduced with kind permission of the Editor, The Lancet., September 28, 2007, July 21, 2011, harv,

Scientific community

The scientific community is a group of all interacting scientists, along with their respective societies and institutions.


File:Einstein 1921 by F Schmutzer - restoration.jpg|thumb|German-born scientist Albert Einstein (1879–1955) developed the theory of relativity. He also won the Nobel Prize in Physics in 1921 for his work in theoretical physicstheoretical physicsScientists are individuals who conduct scientific research to advance knowledge in an area of interest.WEB,weblink Eusocial climbers, E.O. Wilson Foundation, 3 September 2018, But he’s not a scientist, he’s never done scientific research. My definition of a scientist is that you can complete the following sentence: ‘he or she has shown that...’,” Wilson says., WEB,weblink Our definition of a scientist, Science Council, 7 September 2018, A scientist is someone who systematically gathers and uses research and evidence, making a hypothesis and testing it, to gain and share understanding and knowledge., The term scientist was coined by William Whewell in 1833. In modern times, many professional scientists are trained in an academic setting and upon completion, attain an academic degree, with the highest degree being a doctorate such as a Doctor of Philosophy (PhD),JOURNAL, Cyranoski, David, Gilbert, Natasha, Ledford, Heidi, Nayar, Anjali, Yahia, Mohammed, 2011, Education: The PhD factory, Nature, 472, 7343, 276–79, 10.1038/472276a, 21512548, 2011Natur.472..276C, Doctor of Medicine (MD), or Doctor of Engineering (DEng). Many scientists pursue careers in various sectors of the economy such as academia, industry, government, and nonprofit organizations.JOURNAL, Kwok, Roberta, Flexible working: Science in the gig economy, Nature, 550, 419–21, 10.1038/nj7677-549a, 2017, JOURNAL, 2007, Many junior scientists need to take a hard look at their job prospects, Nature, Editorial, 550,weblink 10.1038/nj7677-549a, JOURNAL, Lee, Adrian, Dennis, Carina, Campbell, Phillip, 2007, Graduate survey: A love–hurt relationship, Nature, 550, 7677, 549–52, 10.1038/nj7677-549a, Scientists exhibit a strong curiosity about reality, with some scientists having a desire to apply scientific knowledge for the benefit of health, nations, environment, or industries. Other motivations include recognition by their peers and prestige. The Nobel Prize, a widely regarded prestigious award,{{citation | last = Stockton | first = Nick | title = How did the Nobel Prize become the biggest award on Earth? | newspaper = Wired | date = 7 October 2014 | url =weblink | access-date = 3 September 2018}} is awarded annually to those who have achieved scientific advances in the fields of medicine, physics, chemistry, and economics.

Women in science

{{Further|Women in STEM fields}}File:Marie Curie c1920.jpg|thumb|left|Marie Curie was the first person to be awarded two Nobel Prizes: Physics in 1903 and (Nobel Prize in Chemistry|Chemistry]] in 1911.WEB,weblink Nobel Prize Facts, Nobel Foundation, 2015-10-11, live,weblink July 8, 2017, mdy-all, )Science has historically been a male-dominated field, with some notable exceptions.{{efn|Women in science have included: See the project of Jess Wade (Christina Zdanowicz (27 July 2018), CNN A physicist is writing one Wikipedia entry a day to recognize women in science )}} Women faced considerable discrimination in science, much as they did in other areas of male-dominated societies, such as frequently being passed over for job opportunities and denied credit for their work.{{efn|Nina Byers, Contributions of 20th Century Women to Physics which provides details on 83 female physicists of the 20th century. By 1976, more women were physicists, and the 83 who were detailed were joined by other women in noticeably larger numbers.}} For example, Christine Ladd (1847–1930) was able to enter a PhD program as "C. Ladd"; Christine "Kitty" Ladd completed the requirements in 1882, but was awarded her degree only in 1926, after a career which spanned the algebra of logic (see truth table), color vision, and psychology. Her work preceded notable researchers like Ludwig Wittgenstein and Charles Sanders Peirce. The achievements of women in science have been attributed to their defiance of their traditional role as laborers within the domestic sphere.BOOK, Im/partial Science: Gender Identity in Molecular Biology, Spanier, Bonnie, Indiana University Press, 1995, 9780253209689, From Molecules to Brains, Normal Science Supports Sexist Beliefs about Difference, In the late 20th century, active recruitment of women and elimination of institutional discrimination on the basis of sex greatly increased the number of women scientists, but large gender disparities remain in some fields; in the early 21st century over half of new biologists were female, while 80% of PhDs in physics are given to men.{{Citation needed|date= November 2016}} In the early part of the 21st century, women in the United States earned 50.3% of bachelor's degrees, 45.6% of master's degrees, and 40.7% of PhDs in science and engineering fields. They earned more than half of the degrees in psychology (about 70%), social sciences (about 50%), and biology (about 50-60%) but earned less than half the degrees in the physical sciences, earth sciences, mathematics, engineering, and computer science.BOOK, Breaking into the Lab: Engineering Progress for Women in Science, Rosser, Sue V., New York University Press, 978-0-8147-7645-2, New York, 7, 2012-03-12, Lifestyle choice also plays a major role in female engagement in science; women with young children are 28% less likely to take tenure-track positions due to work-life balance issues,BOOK, Staying Competitive: Patching America's Leaky Pipeline in the Sciences, Goulden, Mark, Frasch, Karie, Mason, Mary Ann, University of Berkeley Law, 2009, and female graduate students' interest in careers in research declines dramatically over the course of graduate school, whereas that of their male colleagues remains unchanged.BOOK, Change of Heart: Career intentions and the chemistry PhD, Royal Society of Chemistry, 2008,

Learned societies

{{Further|Learned society}}File:The Royal Society 1952 London no annotation.jpg|thumb|368px|Physicists in front of the Royal SocietyRoyal SocietyLearned societies for the communication and promotion of scientific thought and experimentation have existed since the Renaissance.WEB, Parrott, Jim, August 9, 2007,weblink Chronicle for Societies Founded from 1323 to 1599, Scholarly Societies Project, September 11, 2007, live,weblink" title="">weblink January 6, 2014, mdy-all, Many scientists belong to a learned society that promotes their respective scientific discipline, profession, or group of related disciplines.WEB,weblink The Environmental Studies Association of Canada - What is a Learned Society?, 10 May 2013, dead,weblink" title="">weblink 29 May 2013, Membership may be open to all, may require possession of some scientific credentials, or may be an honor conferred by election.WEB,weblink Learned societies & academies, 10 May 2013, dead,weblink" title="">weblink 3 June 2014, Most scientific societies are non-profit organizations, and many are professional associations. Their activities typically include holding regular conferences for the presentation and discussion of new research results and publishing or sponsoring academic journals in their discipline. Some also act as professional bodies, regulating the activities of their members in the public interest or the collective interest of the membership. Scholars in the sociology of science{{who|date=September 2014}} argue that learned societies are of key importance and their formation assists in the emergence and development of new disciplines or professions.The professionalization of science, begun in the 19th century, was partly enabled by the creation of distinguished academy of sciences in a number of countries such as the Italian in 1603,WEB, 2006,weblink Accademia Nazionale dei Lincei, Italian, September 11, 2007, live,weblink" title="">weblink February 28, 2010, mdy-all, the British Royal Society in 1660, the French in 1666,WEB, G.G., Meynell,weblink The French Academy of Sciences, 1666–91: A reassessment of the French Académie royale des sciences under Colbert (1666–83) and Louvois (1683–91), October 13, 2011, dead,weblink" title="">weblink January 18, 2012, mdy-all, the American National Academy of Sciences in 1863, the German Kaiser Wilhelm Institute in 1911, and the Chinese Academy of Sciences in 1928. International scientific organizations, such as the International Council for Science, have since been formed to promote cooperation between the scientific communities of different nations.

Science and the public

{{redirect|Science and society|the academic journal|Science & Society}}

Science policy

(File:UN-Science-Policy-Business Forum on Environment.jpg|thumb|right|The United Nations Global Science-Policy-Business Forum on the Environment in Nairobi, Kenya (2017).)Science policy is an area of public policy concerned with the policies that affect the conduct of the scientific enterprise, including research funding, often in pursuance of other national policy goals such as technological innovation to promote commercial product development, weapons development, health care and environmental monitoring. Science policy also refers to the act of applying scientific knowledge and consensus to the development of public policies. Science policy thus deals with the entire domain of issues that involve the natural sciences. In accordance with public policy being concerned about the well-being of its citizens, science policy's goal is to consider how science and technology can best serve the public.State policy has influenced the funding of public works and science for thousands of years, particularly within civilizations with highly organized governments such as imperial China and the Roman Empire. Prominent historical examples include the Great Wall of China, completed over the course of two millennia through the state support of several dynasties, and the Grand Canal of the Yangtze River, an immense feat of hydraulic engineering begun by Sunshu Ao (孫叔敖 7th c. BCE), Ximen Bao (西門豹 5th c.BCE), and Shi Chi (4th c. BCE). This construction dates from the 6th century BCE under the Sui Dynasty and is still in use today. In China, such state-supported infrastructure and scientific research projects date at least from the time of the Mohists, who inspired the study of logic during the period of the Hundred Schools of Thought and the study of defensive fortifications like the Great Wall of China during the Warring States period.Public policy can directly affect the funding of capital equipment and intellectual infrastructure for industrial research by providing tax incentives to those organizations that fund research. Vannevar Bush, director of the Office of Scientific Research and Development for the United States government, the forerunner of the National Science Foundation, wrote in July 1945 that "Science is a proper concern of government."WEB,weblink Science the Endless Frontier, Bush, Vannevar, July 1945, National Science Foundation, November 4, 2016, live,weblink November 7, 2016, mdy-all,

Funding of science

File:CSIRO Main Entomology Building - Central Block.jpg|thumb|right|The Commonwealth Scientific and Industrial Research Organisation (CSIRO) Main Entomology Building in Australia]]Scientific research is often funded through a competitive process in which potential research projects are evaluated and only the most promising receive funding. Such processes, which are run by government, corporations, or foundations, allocate scarce funds. Total research funding in most developed countries is between 1.5% and 3% of GDP.WEB,weblink Main Science and Technology Indicators â€“ 2008-1, OECD, dead,weblink" title="">weblink February 15, 2010, In the OECD, around two-thirds of research and development in scientific and technical fields is carried out by industry, and 20% and 10% respectively by universities and government. The government funding proportion in certain industries is higher, and it dominates research in social science and humanities. Similarly, with some exceptions (e.g. biotechnology) government provides the bulk of the funds for basic scientific research. Many governments have dedicated agencies to support scientific research. Prominent scientific organizations include the National Science Foundation in the United States, the National Scientific and Technical Research Council in Argentina, Commonwealth Scientific and Industrial Research Organisation (CSIRO) in Australia, in France, the Max Planck Society and in Germany, and CSIC in Spain. In commercial research and development, all but the most research-oriented corporations focus more heavily on near-term commercialisation possibilities rather than "blue-sky" ideas or technologies (such as nuclear fusion).

Public awareness of science

{{Further|Science outreach|Science communication}}File:Dinosaur exhibit - Houston Museum of Natural Science - DSC01881.JPG|thumb|250px|right|Dinosaur exhibit in the Houston Museum of Natural ScienceHouston Museum of Natural ScienceThe public awareness of science relates to the attitudes, behaviors, opinions, and activities that make up the relations between science and the general public. it integrates various themes and activities such as science communication, science museums, science festivals, science fairs, citizen science, and science in popular culture. Social scientists have devised various metrics to measure the public understanding of science such as factual knowledge, self-reported knowledge, and structural knowledge.JOURNAL, Ladwig, Peter, Perceived familiarity or factual knowledge? Comparing operationalizations of scientific understanding, Science and Public Policy, 39, 6, 761–74, 10.1093/scipol/scs048, 2012, JOURNAL, Eveland, William, How Web Site Organization Influences Free Recall, Factual Knowledge, and Knowledge Structure Density, Human Communication Research, 30, 2, 208–33, 10.1111/j.1468-2958.2004.tb00731.x, 2004,

Science journalism

The mass media face a number of pressures that can prevent them from accurately depicting competing scientific claims in terms of their credibility within the scientific community as a whole. Determining how much weight to give different sides in a scientific debate may require considerable expertise regarding the matter.WEB, Dickson, David, October 11, 2004,weblinkweblink" title="">weblink June 21, 2010, Science journalism must keep a critical edge, Science and Development Network, Few journalists have real scientific knowledge, and even beat reporters who know a great deal about certain scientific issues may be ignorant about other scientific issues that they are suddenly asked to cover.MAGAZINE, Mooney, Chris, Nov–Dec 2004,weblink Blinded By Science, How 'Balanced' Coverage Lets the Scientific Fringe Hijack Reality, 43, Columbia Journalism Review, February 20, 2008, 4, harv, live,weblink" title="">weblink January 17, 2010, mdy-all, JOURNAL, McIlwaine, S., Nguyen, D.A., Are Journalism Students Equipped to Write About Science?, Australian Studies in Journalism, 2005, 14, 41–60,weblink February 20, 2008, harv, live,weblink" title="">weblink August 1, 2008, mdy-all,

Politicization of science

File:Cook et al. (2016) Studies consensus.jpg|thumb|300px|Results of seven papers from 2004–2015 assessing the overwhelming scientific consensus on man-made global warming (see Surveys of scientists' views on climate change), in contrast to the political controversy over this issue, particularly in the United States.]]Politicization of science occurs when government, business, or advocacy groups use legal or economic pressure to influence the findings of scientific research or the way it is disseminated, reported, or interpreted. Many factors can act as facets of the politicization of science such as populist anti-intellectualism, perceived threats to religious beliefs, postmodernist subjectivism, and fear for business interests.JOURNAL, Goldberg, Jeanne, The Politicization of Scientific Issues: Looking through Galileo's Lens or through the Imaginary Looking Glass, Skeptical Inquirer, 2017, 41, 5, 34–39,weblinkweblink dead, 2018-08-16, 16 August 2018, Politicization of science is usually accomplished when scientific information is presented in a way that emphasizes the uncertainty associated with the scientific evidence.JOURNAL, Bolsen, Toby, Druckman, James N., Counteracting the Politicization of Science, Journal of Communication, 2015, 65, 746, Tactics such as shifting conversation, failing to acknowledge facts, and capitalizing on doubt of scientific consensus have been used to gain more attention for views that have been undermined by scientific evidence.JOURNAL, Freudenberg, William F., Scientific Certainty Argumentation Methods (SCAMs): Science and the Politics of Doubt, Sociological Inquiry, 78, 2–38, 10.1111/j.1475-682X.2008.00219, 2019-08-28, Examples of issues that have involved the politicization of science include the global warming controversy, health effects of pesticides, and health effects of tobacco.JOURNAL, van der Linden, Sander, Leiserowitz, Anthony, Rosenthal, Seth, Maibach, Edward, Inoculating the Public against Misinformation about Climate Change, Global Challenges, 1, 2, 1, 10.1002/gch2.201600008, 2017,weblink

See also

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Further reading

  • Augros, Robert M., Stanciu, George N., The New Story of Science: mind and the universe, Lake Bluff, Ill.: Regnery Gateway, c1984. {{ISBN|0-89526-833-7}}
  • BOOK, Becker, Ernest, 1968, The structure of evil; an essay on the unification of the science of man,weblink registration, New York, G. Braziller, Ernest Becker,
  • Burguete, Maria, and Lam, Lui, eds.(2014). All About Science: Philosophy, History, Sociology & Communication. World Scientific: Singapore. {{ISBN|978-981-4472-92-0}}
  • Cole, K.C., Things your teacher never told you about science: Nine shocking revelations Newsday, Long Island, New York, March 23, 1986, pp. 21+
  • BOOK, Crease, Robert P., World in the Balance: the historic quest for an absolute system of measurement, 2011, 978-0-393-07298-3, New York, W.W. Norton, 317,
  • Lydia Denworth, "A Significant Problem: Standard scientific methods are under fire. Will anything change?", Scientific American, vol. 321, no. 4 (October 2019), pp. 62–67. "The use of p values for nearly a century [since 1925] to determine statistical significance of experimental results has contributed to an illusion of certainty and [to] reproducibility crises in many scientific fields. There is growing determination to reform statistical analysis... Some [researchers] suggest changing statistical methods, whereas others would do away with a threshold for defining "significant" results." (p. 63.)
  • Feyerabend, Paul (2005). Science, history of the philosophy, as cited in BOOK, Honderich, Ted, The Oxford companion to philosophy, Oxford University Press, Oxford Oxfordshire, 2005, 978-0-19-926479-7, 173262485,
  • BOOK, Richard P., Feynman, Jeffrey, Robbins, The pleasure of finding things out the best short works of Richard P. Feynman,weblink registration, 1999, Perseus Books, Cambridge, Massachusetts, 978-0465013128,
  • BOOK, Feynman, R.P., 1999, The Pleasure of Finding Things Out: The Best Short Works of Richard P. Feynman,weblink registration, Perseus Books Group, 978-0-465-02395-0, 181597764,
  • Feynman, Richard "Cargo Cult Science"
  • BOOK, Gaukroger, Stephen, 2006, The Emergence of a Scientific Culture: Science and the Shaping of Modernity 1210–1685, Oxford University Press, Oxford, 978-0-19-929644-6,
  • Gopnik, Alison, "Finding Our Inner Scientist", Daedalus, Winter 2004.
  • Krige, John, and Dominique Pestre, eds., Science in the Twentieth Century, Routledge 2003, {{ISBN|0-415-28606-9}}
  • Levin, Yuval (2008). Imagining the Future: Science and American Democracy. New York, Encounter Books. {{ISBN|1-59403-209-2}}
  • BOOK, David C. Lindberg, Lindberg, D.C., Theories of Vision from al-Kindi to Kepler, Chicago, University of Chicago Press, 1976, harv,
  • Kuhn, Thomas, The Structure of Scientific Revolutions, 1962.
  • BOOK, McComas, William F.,weblink The principal elements of the nature of science: Dispelling the myths, The nature of science in science education: rationales and strategies, McComas, William F., 1998, Springer, 978-0-7923-6168-8,
  • JOURNAL, Joseph Needham, Needham, Joseph, 1954, Science and Civilisation in China: Introductory Orientations, Cambridge University Press, 1, harv, Science and Civilisation in China,
  • BOOK, Obler, Paul C., Estrin, Herman A., The New Scientist: Essays on the Methods and Values of Modern Science,weblink registration, Anchor Books, Doubleday, 1962,
  • Papineau, David. (2005). Science, problems of the philosophy of., as cited in BOOK, Honderich, Ted, The Oxford companion to philosophy, Oxford University Press, Oxford Oxfordshire, 2005, 978-0-19-926479-7, 173262485,
  • BOOK, Parkin, D., 1991, Simultaneity and Sequencing in the Oracular Speech of Kenyan Diviners, Philip M. Peek, African Divination Systems: Ways of Knowing, Indianapolis, IN, Indiana University Press, harv,
  • BOOK, Russell, Bertrand, 1985, 1952, The Impact of Science on Society, Unwin, London, 978-0-04-300090-8,
  • BOOK, Rutherford, F. James, Ahlgren, Andrew, 1990, Science for all Americans, American Association for the Advancement of Science, Oxford University Press, New York, NY, 978-0-19-506771-2,weblink
  • BOOK, harv, Smith, A. Mark, Alhacen's Theory of Visual Perception: A Critical Edition, with English Translation and Commentary, of the First Three Books of Alhacen's De Aspectibus, the Medieval Latin Version of Ibn al-Haytham's Kitāb al-Manāẓir, 2 vols, Transactions of the American Philosophical Society, 91, 4–5, Philadelphia, 2001, 978-0-87169-914-5, American Philosophical Society, Philadelphia, 47168716, De Aspectibus,
    • JOURNAL, 3657358, Alhacen's Theory of Visual Perception: A Critical Edition, with English Translation and Commentary, of the First Three Books of Alhacen's "De aspectibus", the Medieval Latin Version of Ibn al-Haytham's "Kitāb al-Manāẓir": Volume One, Transactions of the American Philosophical Society, 91, 4, i–337, Smith, A. Mark, 2001,
    • JOURNAL, 3657357, Alhacen's Theory of Visual Perception: A Critical Edition, with English Translation and Commentary, of the First Three Books of Alhacen's "De aspectibus", the Medieval Latin Version of Ibn al-Haytham's "Kitāb al-Manāẓir": Volume Two, Transactions of the American Philosophical Society, 91, 5, 339–819, Smith, A. Mark, 2001, 10.2307/3657357,
  • BOOK, Thurs, Daniel Patrick, 2007, Science Talk: Changing Notions of Science in American Popular Culture, 978-0-8135-4073-3,weblink

External links

  • "b:GCSE Science|GCSE Science textbook]]".
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