Stephen Hawking

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Stephen Hawking
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{{pp-vandalism|small=yes}}{{short description|British theoretical physicist, cosmologist, and author}}{{Use British English|date=August 2019}}{{EngvarB|date=March 2018}}{{Use dmy dates|date=September 2019}}

| image = Stephen Hawking.StarChild.jpg| alt = Black-and-white photograph of Stephen Hawking at NASA's StarChild Learning Center| caption = Hawking at NASA's StarChild Learning Center, 1980sBritish people>British| birth_name = Stephen William Hawkingdf=y01|08}}| birth_place = Oxford, England, United Kingdomdf=y03194208}}| death_place = Cambridge, England, United Kingdom| death_cause = Amyotrophic lateral sclerosisWestminster Abbey, City of Westminster>Westminster, LondonSTEPHEN HAWKING TO JOIN NEWTON, DARWIN IN FINAL RESTING PLACE >FIRST=ESTELLE URL=HTTPS://WWW.REUTERS.COM/ARTICLE/US-BRITAIN-HAWKING-ASHES/STEPHEN-HAWKING-TO-JOIN-NEWTON-DARWIN-IN-FINAL-RESTING-PLACE-IDUSKBN1GW2GV PUBLISHER=REUTERS DATE=20 MARCH 2018 ARCHIVE-DATE=21 MARCH 2018, live, | education = St Albans School, Hertfordshire
  • {{marriage|Jane Wilde|14 July 1965|1995|end=div{edih}
  • {{marriage|Elaine Mason|September 1995|2007|end=div}}}}| children = 3, including Lucy Hawking}} Dennis William Sciama>Dennis SciamaFergusonp=29}} }}Stephen William Hawking {{post-nominals|country=GBR|CH|CBE|FRS|FRSA}} (8 January 1942 – 14 March 2018) was an English theoretical physicist, cosmologist, and author who was director of research at the Centre for Theoretical Cosmology at the University of Cambridge at the time of his death.JOURNAL, Carr, Bernard J., Ellis, George F. R., Gibbons, Gary W., Hartle, James B., Hertog, Thomas, Penrose, Roger, Perry, Malcolm J., Thorne, Kip S., Stephen William Hawking CH CBE. 8 January 1942—14 March 2018, Biographical Memoirs of Fellows of the Royal Society, 66, 2019, 267–308, 0080-4606, 10.1098/rsbm.2019.0001, He was the Lucasian Professor of Mathematics at the University of Cambridge between 1979 and 2009.His scientific works included a collaboration with Roger Penrose on gravitational singularity theorems in the framework of general relativity and the theoretical prediction that black holes emit radiation, often called Hawking radiation. Hawking was the first to set out a theory of cosmology explained by a union of the general theory of relativity and quantum mechanics. He was a vigorous supporter of the many-worlds interpretation of quantum mechanics.Gardner, Martin (September/October 2001). "Multiverses and Blackberries" {{Webarchive|url= |date=28 July 2016 }}. "Notes of a Fringe-Watcher". Skeptical Inquirer. Volume 25, No. 5.Price, Michael Clive (February 1995). "THE EVERETT FAQ" {{webarchive|url= |date=20 April 2016 }}. Department of Physics, Washington University in St. Louis. Retrieved 17 December 2014.Hawking achieved commercial success with several works of popular science in which he discusses his own theories and cosmology in general. His book A Brief History of Time appeared on the British Sunday Times best-seller list for a record-breaking 237 weeks. Hawking was a Fellow of the Royal Society (FRS), a lifetime member of the Pontifical Academy of Sciences, and a recipient of the Presidential Medal of Freedom, the highest civilian award in the United States. In 2002, Hawking was ranked number 25 in the BBC's poll of the 100 Greatest Britons.In 1963, Hawking was diagnosed with an early-onset slow-progressing form of motor neurone disease (MND; also known as amyotrophic lateral sclerosis "ALS" or Lou Gehrig's disease) that gradually paralysed him over the decades.NEWS, Mind over matter: How Stephen Hawking defied Motor Neurone Disease for 50 years,weblink The Independent, 26 November 2015, 15 September 2017,weblink" title="">weblink 23 August 2017, live, NEWS, How Has Stephen Hawking Lived to 70 with ALS?,weblink 23 December 2014, Scientific American, 7 January 2012, Q: How frequent are these cases of very slow-progressing forms of ALS? A: I would say probably less than a few percent.,weblink" title="">weblink 30 August 2015, live, Even after the loss of his speech, he was still able to communicate through a speech-generating device, initially through use of a hand-held switch, and eventually by using a single cheek muscle. He died on 14 March 2018 at the age of 76, after living with the disease for more than 50 years.NEWS, Henry, David, Stephen Hawking, physicist who reshaped cosmology, passes away at 76,weblink The Economic Times, 14 March 2018, 15 March 2018,weblink 14 March 2018, live,

Early life


Hawking was born on 8 January 1942 in Oxford to Frank (1905–1986)WEB,weblink Frank Hawking,, 20 March 2018,weblink 15 March 2018, live, and Isobel Eileen Hawking (née Walker; 1915–2013).{{sfn|Larsen|2005|pp=xiii, 2}}{{sfn|Ferguson|2011|p=21}}WEB,weblink Isobel Eileen Hawking,, 20 March 2018,weblink 15 March 2018, live, Hawking's mother was born into a family of doctors in Glasgow, Scotland.WEB,weblink Mind over matter Stephen Hawking, The Herald (Glasgow), The Herald, Glasgow, 14 March 2018,weblink" title="">weblink 30 May 2016, live, WEB,weblink Stephen Hawking, "Equal to Anything!" [Excerpt], Ferguson, Kitty, 6 January 2012, Scientific American, 21 March 2018,weblink 22 March 2018, live, His wealthy paternal great-grandfather, from Yorkshire, over-extended himself buying farm land and then went bankrupt in the great agricultural depression during the early 20th century. His paternal great-grandmother saved the family from financial ruin by opening a school in their home. Despite their families' financial constraints, both parents attended the University of Oxford, where Frank read medicine and Isobel read Philosophy, Politics and Economics.{{sfn|Ferguson|2011|p=21}} Isobel worked as a secretary for a medical research institute, and Frank was a medical researcher.{{sfn|Ferguson|2011|p=21}}{{sfn|White|Gribbin|2002|p=6}} Hawking had two younger sisters, Philippa and Mary, and an adopted brother, Edward Frank David (1955–2003).WEB,weblink Edward Frank David Hawking,, 20 March 2018,weblink 20 March 2018, live, {{sfn|Larsen|2005|pp=2, 5}}In 1950, when Hawking's father became head of the division of parasitology at the National Institute for Medical Research, the family moved to St Albans, Hertfordshire.{{sfn|Ferguson|2011|p=22}}{{sfn|Larsen|2005|p=xiii}} In St Albans, the family was considered highly intelligent and somewhat eccentric;{{sfn|Ferguson|2011|p=22}}{{sfn|White|Gribbin|2002|p=12}} meals were often spent with each person silently reading a book.{{sfn|Ferguson|2011|p=22}} They lived a frugal existence in a large, cluttered, and poorly maintained house and travelled in a converted London taxicab.{{sfn|Ferguson|2011|pp=22–23}}{{sfn|White|Gribbin|2002|pp=11–12}} During one of Hawking's father's frequent absences working in Africa,{{sfn|White|Gribbin|2002|p=13}} the rest of the family spent four months in Majorca visiting his mother's friend Beryl and her husband, the poet Robert Graves.{{sfn|Larsen|2005|p=3}}

Primary and secondary school years

Hawking began his schooling at the Byron House School in Highgate, London. He later blamed its "progressive methods" for his failure to learn to read while at the school.WEB,weblink Stephen Hawking: "I'm happy if I have added something to our understanding of the universe", Stephen, Hawking, 7 December 2013, Radio Times, 6 January 2017,weblink" title="">weblink 7 January 2017, live, {{sfn|Ferguson|2011|p=22}} In St Albans, the eight-year-old Hawking attended St Albans High School for Girls for a few months. At that time, younger boys could attend one of the houses.{{sfn|Larsen|2005|p=3}}{{sfn|Ferguson|2011|p=24}}Hawking attended two independent (i.e. fee-paying) schools, first Radlett School{{sfn|Ferguson|2011|p=24}} and from September 1952, St Albans School,{{sfn|White|Gribbin|2002|p=8}} after passing the eleven-plus a year early.My brief history – Stephen Hawking (2013). The family placed a high value on education.{{sfn|Ferguson|2011|p=22}} Hawking's father wanted his son to attend the well-regarded Westminster School, but the 13-year-old Hawking was ill on the day of the scholarship examination. His family could not afford the school fees without the financial aid of a scholarship, so Hawking remained at St Albans.{{sfn|White|Gribbin|2002|pp=7–8}}{{sfn|Larsen|2005|p=4}} A positive consequence was that Hawking remained close to a group of friends with whom he enjoyed board games, the manufacture of fireworks, model aeroplanes and boats,{{sfn|Ferguson|2011|pp=25–26}} and long discussions about Christianity and extrasensory perception.{{sfn|White|Gribbin|2002|pp=14–16}} From 1958 on, with the help of the mathematics teacher Dikran Tahta, they built a computer from clock parts, an old telephone switchboard and other recycled components.{{sfn|Ferguson|2011|p=26}}{{sfn|White|Gribbin|2002|pp=19–20}}Although known at school as "Einstein", Hawking was not initially successful academically.{{sfn|Ferguson|2011|p=25}} With time, he began to show considerable aptitude for scientific subjects and, inspired by Tahta, decided to read mathematics at university.{{sfn|White|Gribbin|2002|pp=17–18}}{{sfn|Ferguson|2011|p=27}} Hawking's father advised him to study medicine, concerned that there were few jobs for mathematics graduates.{{sfn|White|Gribbin|2002|p=41}} He also wanted his son to attend University College, Oxford, his own alma mater. As it was not possible to read mathematics there at the time, Hawking decided to study physics and chemistry. Despite his headmaster's advice to wait until the next year, Hawking was awarded a scholarship after taking the examinations in March 1959.{{sfn|Ferguson|2011|pp=27–28}}{{sfn|White|Gribbin|2002|pp=42–43}}

Undergraduate years

Hawking began his university education at University College, Oxford, in October 1959 at the age of 17.{{sfn|Ferguson|2011|p=28}} For the first 18 months, he was bored and lonely{{snd}}he found the academic work "ridiculously easy".{{sfn|Ferguson|2011|pp=28–29}}{{sfn|White|Gribbin|2002|pp=46–47, 51}} His physics tutor, Robert Berman, later said, "It was only necessary for him to know that something could be done, and he could do it without looking to see how other people did it."{{sfn|Ferguson|2011|p=29}} A change occurred during his second and third year when, according to Berman, Hawking made more of an effort "to be one of the boys". He developed into a popular, lively and witty college member, interested in classical music and science fiction.{{sfn|Ferguson|2011|p=28}} Part of the transformation resulted from his decision to join the college boat club, the University College Boat Club, where he coxed a rowing crew.{{sfn|Ferguson|2011|pp=30–31}}{{sfn|Hawking|1992|loc=p. 44}} The rowing coach at the time noted that Hawking cultivated a daredevil image, steering his crew on risky courses that led to damaged boats.{{sfn|White|Gribbin|2002|p=50}}{{sfn|Ferguson|2011|pp=30–31}}Hawking estimated that he studied about 1,000 hours during his three years at Oxford. These unimpressive study habits made sitting his finals a challenge, and he decided to answer only theoretical physics questions rather than those requiring factual knowledge. A first-class honours degree was a condition of acceptance for his planned graduate study in cosmology at the University of Cambridge.{{sfn|White|Gribbin|2002|p=53}}{{sfn|Ferguson|2011|p=31}} Anxious, he slept poorly the night before the examinations, and the final result was on the borderline between first- and second-class honours, making a viva (oral examination) with the Oxford examiners necessary.{{sfn|Ferguson|2011|p=31}}{{sfn|White|Gribbin|2002|p=54}}Hawking was concerned that he was viewed as a lazy and difficult student. So, when asked at the viva to describe his plans, he said, "If you award me a First, I will go to Cambridge. If I receive a Second, I shall stay in Oxford, so I expect you will give me a First."{{sfn|Ferguson|2011|p=31}}{{sfn|White|Gribbin|2002|pp=54–55}} He was held in higher regard than he believed; as Berman commented, the examiners "were intelligent enough to realise they were talking to someone far cleverer than most of themselves".{{sfn|Ferguson|2011|p=31}} After receiving a first-class BA (Hons.) degree in physics and completing a trip to Iran with a friend, he began his graduate work at Trinity Hall, Cambridge, in October 1962.{{sfn|White|Gribbin|2002|p=56}}{{sfn|Ferguson|2011|pp=31–32}}

Graduate years

Hawking's first year as a doctoral student was difficult. He was initially disappointed to find that he had been assigned Dennis William Sciama, one of the founders of modern cosmology, as a supervisor rather than noted Yorkshire astronomer Fred Hoyle,{{sfn|Ferguson|2011|p=33}}{{sfn|White|Gribbin|2002|p=58}} and he found his training in mathematics inadequate for work in general relativity and cosmology.{{sfn|Ferguson|2011|pp=33–34}} After being diagnosed with motor neurone disease, Hawking fell into a depression{{snd}}though his doctors advised that he continue with his studies, he felt there was little point.{{sfn|White|Gribbin|2002|pp=61–63}} His disease progressed more slowly than doctors had predicted. Although Hawking had difficulty walking unsupported, and his speech was almost unintelligible, an initial diagnosis that he had only two years to live proved unfounded. With Sciama's encouragement, he returned to his work.{{sfn|Ferguson|2011|p=36}}{{sfn|White|Gribbin|2002|pp=69–70}} Hawking started developing a reputation for brilliance and brashness when he publicly challenged the work of Fred Hoyle and his student Jayant Narlikar at a lecture in June 1964.{{sfn|Ferguson|2011|p=42}}{{sfn|White|Gribbin|2002|pp=68–69}}When Hawking began his graduate studies, there was much debate in the physics community about the prevailing theories of the creation of the universe: the Big Bang and Steady State theories.{{sfn|Ferguson|2011|p=34}} Inspired by Roger Penrose's theorem of a spacetime singularity in the centre of black holes, Hawking applied the same thinking to the entire universe; and, during 1965, he wrote his thesis on this topic.WEB,weblink Stephen Hawking's PhD thesis, explained simply, 27 November 2017,weblink 13 December 2017, live, {{sfn|White|Gribbin|2002|pp=71–72}} Hawking's thesis was approved in 1966. There were other positive developments: Hawking received a research fellowship at Gonville and Caius College at Cambridge;{{sfn|Ferguson|2011|pp=43–44}} he obtained his PhD degree in applied mathematics and theoretical physics, specialising in general relativity and cosmology, in March 1966;{{sfn|Ferguson|2011|p=47}} and his essay "Singularities and the Geometry of Space-Time" shared top honours with one by Penrose to win that year's prestigious Adams Prize.{{sfn|Larsen|2005|p=xix}}{{sfn|Ferguson|2011|p=47}}




In his work, and in collaboration with Penrose, Hawking extended the singularity theorem concepts first explored in his doctoral thesis. This included not only the existence of singularities but also the theory that the universe might have started as a singularity. Their joint essay was the runner-up in the 1968 Gravity Research Foundation competition.{{sfn|White|Gribbin|2002|p=101}}{{sfn|Ferguson|2011|pp=61, 64}} In 1970, they published a proof that if the universe obeys the general theory of relativity and fits any of the models of physical cosmology developed by Alexander Friedmann, then it must have begun as a singularity.{{sfn|Ferguson|2011|pp=64–65}}{{sfn|White|Gribbin|2002|pp=115–16}} In 1969, Hawking accepted a specially created Fellowship for Distinction in Science to remain at Caius.{{sfn|Ferguson|2011|p=49}}In 1970, Hawking postulated what became known as the second law of black hole dynamics, that the event horizon of a black hole can never get smaller.{{sfn|Ferguson|2011|pp=65–67}} With James M. Bardeen and Brandon Carter, he proposed the four laws of black hole mechanics, drawing an analogy with thermodynamics.{{sfn|Larsen|2005|p=38}} To Hawking's irritation, Jacob Bekenstein, a graduate student of John Wheeler, went further—and ultimately correctly—to apply thermodynamic concepts literally.{{sfn|Ferguson|2011|pp=67–68}}{{sfn|White|Gribbin|2002|pp=123–24}}In the early 1970s, Hawking's work with Carter, Werner Israel and David C. Robinson strongly supported Wheeler's no-hair theorem, one that states that no matter what the original material from which a black hole is created, it can be completely described by the properties of mass, electrical charge and rotation.{{sfn|Larsen|2005|p=33}} His essay titled "Black Holes" won the Gravity Research Foundation Award in January 1971.{{sfn|Larsen|2005|p=35}} Hawking's first book, The Large Scale Structure of Space-Time, written with George Ellis, was published in 1973.{{sfn|Ferguson|2011|p=68}}Beginning in 1973, Hawking moved into the study of quantum gravity and quantum mechanics.{{sfn|Larsen|2005|p=39}}{{sfn|Ferguson|2011|p=68}} His work in this area was spurred by a visit to Moscow and discussions with Yakov Borisovich Zel'dovich and Alexei Starobinsky, whose work showed that according to the uncertainty principle, rotating black holes emit particles.{{sfn|White|Gribbin|2002|p=146}} To Hawking's annoyance, his much-checked calculations produced findings that contradicted his second law, which claimed black holes could never get smaller,{{sfn|Ferguson|2011|p=70}} and supported Bekenstein's reasoning about their entropy.{{sfn|Larsen|2005|p=41}}{{sfn|White|Gribbin|2002|p=146}}His results, which Hawking presented from 1974, showed that black holes emit radiation, known today as Hawking radiation, which may continue until they exhaust their energy and evaporate.{{sfn|Ferguson|2011|pp=69–73}} Initially, Hawking radiation was controversial. By the late 1970s and following the publication of further research, the discovery was widely accepted as a significant breakthrough in theoretical physics.{{sfn|Ferguson|2011|pp=70–74}}{{sfn|Larsen|2005|pp=42–43}}{{sfn|White|Gribbin|2002|pp=150–51}} Hawking was elected a Fellow of the Royal Society (FRS) in 1974, a few weeks after the announcement of Hawking radiation. At the time, he was one of the youngest scientists to become a Fellow.{{sfn|Larsen|2005|p=44}}{{sfn|White|Gribbin|2002|p=133}}Hawking was appointed to the Sherman Fairchild Distinguished visiting professorship at the California Institute of Technology (Caltech) in 1974. He worked with a friend on the faculty, Kip Thorne,{{sfn|Ferguson|2011|pp=82, 86}} and engaged him in a scientific wager about whether the X-ray source Cygnus X-1 was a black hole. The wager was an "insurance policy" against the proposition that black holes did not exist.{{sfn|Ferguson|2011|pp=86–88}} Hawking acknowledged that he had lost the bet in 1990, a bet that was the first of several he was to make with Thorne and others.{{sfn|Ferguson|2011|pp=150,189, 219}} Hawking had maintained ties to Caltech, spending a month there almost every year since this first visit.{{sfn|Ferguson|2011|p=95}}


Hawking returned to Cambridge in 1975 to a more academically senior post, as reader in gravitational physics. The mid to late 1970s were a period of growing public interest in black holes and the physicists who were studying them. Hawking was regularly interviewed for print and television.{{sfn|Ferguson|2011|p=90}}{{sfn|White|Gribbin|2002|pp=132–33}} He also received increasing academic recognition of his work.{{sfn|Ferguson|2011|p=92}} In 1975, he was awarded both the Eddington Medal and the Pius XI Gold Medal, and in 1976 the Dannie Heineman Prize, the Maxwell Prize and the Hughes Medal.{{sfn|White|Gribbin|2002|p=162}}{{sfn|Larsen|2005|pp=xv}} He was appointed a professor with a chair in gravitational physics in 1977.{{sfn|Ferguson|2011|p=91}} The following year he received the Albert Einstein Medal and an honorary doctorate from the University of Oxford.{{sfn|Larsen|2005|p=xiv}}{{sfn|Ferguson|2011|p=92}}In 1979, Hawking was elected Lucasian Professor of Mathematics at the University of Cambridge.{{sfn|Ferguson|2011|p=92}}NEWS,weblink Stephen Hawking to retire as Cambridge's Professor of Mathematics, The Daily Telegraph, 23 October 2008, 15 March 2018,weblink 16 March 2018, live, His inaugural lecture in this role was titled: "Is the End in Sight for Theoretical Physics?" and proposed N=8 Supergravity as the leading theory to solve many of the outstanding problems physicists were studying.{{sfn|Ferguson|2011|pp=93–94}} His promotion coincided with a health crisis which led to his accepting, albeit reluctantly, some nursing services at home.{{sfn|Ferguson|2011|pp=92–93}} At the same time, he was also making a transition in his approach to physics, becoming more intuitive and speculative rather than insisting on mathematical proofs. "I would rather be right than rigorous", he told Kip Thorne.{{sfn|Ferguson|2011|p=96}} In 1981, he proposed that information in a black hole is irretrievably lost when a black hole evaporates. This information paradox violates the fundamental tenet of quantum mechanics, and led to years of debate, including "the Black Hole War" with Leonard Susskind and Gerard 't Hooft.{{sfn|Ferguson|2011|pp=96–101}}Cosmological inflation{{snd}}a theory proposing that following the Big Bang, the universe initially expanded incredibly rapidly before settling down to a slower expansion{{snd}}was proposed by Alan Guth and also developed by Andrei Linde.{{sfn|Ferguson|2011|pp=108–11}} Following a conference in Moscow in October 1981, Hawking and Gary Gibbons organised a three-week Nuffield Workshop in the summer of 1982 on "The Very Early Universe" at Cambridge University, a workshop that focused mainly on inflation theory.{{sfn|Ferguson|2011|pp=111–14}} Hawking also began a new line of quantum theory research into the origin of the universe. In 1981 at a Vatican conference, he presented work suggesting that there might be no boundary{{snd}}or beginning or ending{{snd}}to the universe.{{sfn|Ferguson|2011|pp=102–103}}{{sfn|White|Gribbin|2002|p=180}}Hawking subsequently developed the research in collaboration with Jim Hartle, and in 1983 they published a model, known as the Hartle–Hawking state. It proposed that prior to the Planck epoch, the universe had no boundary in space-time; before the Big Bang, time did not exist and the concept of the beginning of the universe is meaningless. The initial singularity of the classical Big Bang models was replaced with a region akin to the North Pole. One cannot travel north of the North Pole, but there is no boundary there{{snd}}it is simply the point where all north-running lines meet and end.{{sfn|Baird|2007|loc=p. 234}}{{sfn|White|Gribbin|2002|pp=180–83}} Initially, the no-boundary proposal predicted a closed universe, which had implications about the existence of God. As Hawking explained, "If the universe has no boundaries but is self-contained... then God would not have had any freedom to choose how the universe began."{{sfn|Ferguson|2011|p=129}}Hawking did not rule out the existence of a Creator, asking in A Brief History of Time "Is the unified theory so compelling that it brings about its own existence?"{{sfn|Ferguson|2011|p=130}} In his early work, Hawking spoke of God in a metaphorical sense. In A Brief History of Time he wrote: "If we discover a complete theory, it would be the ultimate triumph of human reason{{snd}}for then we should know the mind of God." In the same book he suggested that the existence of God was not necessary to explain the origin of the universe. Later discussions with Neil Turok led to the realisation that the existence of God was also compatible with an open universe.{{sfn|Yulsman|2003|loc=pp. 174–176}}Further work by Hawking in the area of arrows of time led to the 1985 publication of a paper theorising that if the no-boundary proposition were correct, then when the universe stopped expanding and eventually collapsed, time would run backwards.{{sfn|Ferguson|2011|pp=180–182}} A paper by Don Page and independent calculations by Raymond Laflamme led Hawking to withdraw this concept.{{sfn|Ferguson|2011|p=182}} Honours continued to be awarded: in 1981 he was awarded the American Franklin Medal,{{sfn|White|Gribbin|2002|p=274}} and in the 1982 New Year Honours appointed a Commander of the Order of the British Empire (CBE).{{sfn|Larsen|2005|pp=x–xix}}{{sfn|Ferguson|2011|p=114}}{{London Gazette |issue=48837 |date=30 December 1981 |page=8 |supp=y}} These awards did not significantly change Hawking's financial status, and motivated by the need to finance his children's education and home expenses, he decided in 1982 to write a popular book about the universe that would be accessible to the general public.{{sfn|Ferguson|2011|pp=134–35}}{{sfn|White|Gribbin|2002|pp=205, 220–21}} Instead of publishing with an academic press, he signed a contract with Bantam Books, a mass market publisher, and received a large advance for his book.{{sfn|Ferguson|2011|p=134}}{{sfn|White|Gribbin|2002|pp=220–27}} A first draft of the book, called A Brief History of Time, was completed in 1984.{{sfn|Ferguson|2011|p=135}}One of the first messages Hawking produced with his speech-generating device was a request for his assistant to help him finish writing A Brief History of Time.{{sfn|Ferguson|2011|p=137}} Peter Guzzardi, his editor at Bantam, pushed him to explain his ideas clearly in non-technical language, a process that required many revisions from an increasingly irritated Hawking.{{sfn|Ferguson|2011|pp=140–42}} The book was published in April 1988 in the US and in June in the UK, and it proved to be an extraordinary success, rising quickly to the top of best-seller lists in both countries and remaining there for months.{{sfn|Ferguson|2011|p=143}}{{sfn|White|Gribbin|2002|pp=243–45}} The book was translated into many languages,{{sfn|Ferguson|2011|pp=143–44}} and ultimately sold an estimated 9{{nbsp}}million copies.Media attention was intense,{{sfn|Ferguson|2011|pp=143–44}} and a Newsweek magazine cover and a television special both described him as "Master of the Universe".{{sfn|Ferguson|2011|p=146}} Success led to significant financial rewards, but also the challenges of celebrity status.{{sfn|Ferguson|2011|pp=145–46}} Hawking travelled extensively to promote his work, and enjoyed partying and dancing into the small hours.{{sfn|Ferguson|2011|pp=143–44}} A difficulty refusing the invitations and visitors left him limited time for work and his students.{{sfn|Ferguson|2011|p=149}} Some colleagues were resentful of the attention Hawking received, feeling it was due to his disability.{{sfn|Ferguson|2011|pp=147–48}}{{sfn|White|Gribbin|2002|pp=230–31}}He received further academic recognition, including five more honorary degrees,{{sfn|Ferguson|2011|p=146}} the Gold Medal of the Royal Astronomical Society (1985),{{sfn|Larsen|2005|p=xvi}} the Paul Dirac Medal (1987){{sfn|Ferguson|2011|p=146}} and, jointly with Penrose, the prestigious Wolf Prize (1988).{{sfn|White|Gribbin|2002|p=279}} In the 1989 Birthday Honours, he was appointed a Companion of Honour (CH).{{sfn|Ferguson|2011|p=149}}{{London Gazette |issue=48837 |date=16 June 1989 |page=18 |supp=y}} He reportedly declined a knighthood in the late 1990s in objection to the UK's science funding policy.NEWS,weblink Stephen Hawking warns Government over 'disastrous' science funding cuts, Tom Peterkin, 15 June 2008, The Telegraph, 2 April 2018, en-GB,weblink 2 April 2018, live, NEWS,weblink Why Professor Stephen Hawking never had a knighthood, Sally Guyoncourt, 14 March 2018, I News, 15 June 2018,weblink 16 June 2018, live,


File:Gross Witten Hawking TIFR 2001.jpg|thumb|upright=1.15|alt=Hawking outside, in his wheelchair, talking to David Gross and Edward Witten|Hawking with string theorists David Gross and Edward Witten at the 2001 Strings Conference, TIFRTIFRHawking pursued his work in physics: in 1993 he co-edited a book on Euclidean quantum gravity with Gary Gibbons and published a collected edition of his own articles on black holes and the Big Bang.{{sfn|Ferguson|2011|p=180}} In 1994, at Cambridge's Newton Institute, Hawking and Penrose delivered a series of six lectures that were published in 1996 as "The Nature of Space and Time".{{sfn|Ferguson|2011|p=188}} In 1997, he conceded a 1991 public scientific wager made with Kip Thorne and John Preskill of Caltech. Hawking had bet that Penrose's proposal of a "cosmic censorship conjecture"{{snd}}that there could be no "naked singularities" unclothed within a horizon{{snd}}was correct.{{sfn|Ferguson|2011|pp=189–90}}After discovering his concession might have been premature, a new and more refined wager was made. This one specified that such singularities would occur without extra conditions.{{sfn|Ferguson|2011|p=190}} The same year, Thorne, Hawking and Preskill made another bet, this time concerning the black hole information paradox. Thorne and Hawking argued that since general relativity made it impossible for black holes to radiate and lose information, the mass-energy and information carried by Hawking radiation must be "new", and not from inside the black hole event horizon. Since this contradicted the quantum mechanics of microcausality, quantum mechanics theory would need to be rewritten. Preskill argued the opposite, that since quantum mechanics suggests that the information emitted by a black hole relates to information that fell in at an earlier time, the concept of black holes given by general relativity must be modified in some way.Hawking also maintained his public profile, including bringing science to a wider audience. A film version of A Brief History of Time, directed by Errol Morris and produced by Steven Spielberg, premiered in 1992. Hawking had wanted the film to be scientific rather than biographical, but he was persuaded otherwise. The film, while a critical success, was not widely released.{{sfn|Ferguson|2011|pp=168–70}} A popular-level collection of essays, interviews, and talks titled Black Holes and Baby Universes and Other Essays was published in 1993,{{sfn|Ferguson|2011|p=178}} and a six-part television series Stephen Hawking's Universe and a companion book appeared in 1997. As Hawking insisted, this time the focus was entirely on science.{{sfn|Ferguson|2011|p=189}}{{sfn|Larsen|2005|p=97}}


File:Stephen Hawking 050506.jpg|thumb|left|alt=Stephen Hawking sitting in his wheelchair inside|upright|Hawking at the to inaugurate the Laboratory of Astronomy and Particles in Paris, and the French release of his work God Created the IntegersGod Created the IntegersHawking continued his writings for a popular audience, publishing The Universe in a Nutshell in 2001,{{sfn|Ferguson|2011|pp=199–200}} and A Briefer History of Time, which he wrote in 2005 with Leonard Mlodinow to update his earlier works with the aim of making them accessible to a wider audience, and God Created the Integers, which appeared in 2006.{{sfn|Ferguson|2011|pp=222–23}} Along with (:nl:Thomas Hertog|Thomas Hertog) at CERN and Jim Hartle, from 2006 on Hawking developed a theory of {{anchor|Top-down cosmology}}"top-down cosmology", which says that the universe had not one unique initial state but many different ones, and therefore that it is inappropriate to formulate a theory that predicts the universe's current configuration from one particular initial state. Top-down cosmology posits that the present "selects" the past from a superposition of many possible histories. In doing so, the theory suggests a possible resolution of the fine-tuning question.Hawking continued to travel widely, including trips to Chile, Easter Island, South Africa, Spain (to receive the Fonseca Prize in 2008),{{sfn|Ferguson|2011|p=233}} Canada,{{sfn|Ferguson|2011|p=239}} and numerous trips to the United States.{{sfn|Ferguson|2011|p=269}} For practical reasons related to his disability, Hawking increasingly travelled by private jet, and by 2011 that had become his only mode of international travel.{{sfn|Ferguson|2011|p=197,269}}File:Weston Library Opening by John Cairns 20.3.15-139.jpg|thumb|right|Hawking with University of Oxford librarian Richard Ovenden (left) and naturalist David Attenborough (right) at the opening of the Weston Library, Oxford, in March 2015. Ovenden awarded the Bodley MedalBodley MedalBy 2003, consensus among physicists was growing that Hawking was wrong about the loss of information in a black hole.{{sfn|Ferguson|2011|pp=216–17}} In a 2004 lecture in Dublin, he conceded his 1997 bet with Preskill, but described his own, somewhat controversial solution to the information paradox problem, involving the possibility that black holes have more than one topology.{{sfn|Ferguson|2011|pp=217–20}} In the 2005 paper he published on the subject, he argued that the information paradox was explained by examining all the alternative histories of universes, with the information loss in those with black holes being cancelled out by those without such loss.{{sfn|Ferguson|2011|pp=223–24}} In January 2014, he called the alleged loss of information in black holes his "biggest blunder".NEWS, Kwong, Matt, 28 January 2014, Stephen Hawking's black holes 'blunder' stirs debate,weblink CBC News, 14 March 2018,weblink" title="">weblink 17 March 2018, live, As part of another longstanding scientific dispute, Hawking had emphatically argued, and bet, that the Higgs boson would never be found.{{sfn|Ferguson|2011|pp=95, 236}} The particle was proposed to exist as part of the Higgs field theory by Peter Higgs in 1964. Hawking and Higgs engaged in a heated and public debate over the matter in 2002 and again in 2008, with Higgs criticising Hawking's work and complaining that Hawking's "celebrity status gives him instant credibility that others do not have."{{sfn|Ferguson|2011|pp=94–95, 236}} The particle was discovered in July 2012 at CERN following construction of the Large Hadron Collider. Hawking quickly conceded that he had lost his bet and said that Higgs should win the Nobel Prize for Physics, which he did in 2013.NEWS, Amos, Jonathan, 8 October 2013,weblink Higgs: Five decades of noble endeavour, BBC News, 10 May 2016,weblink" title="">weblink 11 June 2016, live, File:Stephen Hawking in Stockholm, 2015.jpg|thumb|left|Hawking holding a public lecture at the Stockholm WaterfrontStockholm WaterfrontIn 2007, Hawking and his daughter Lucy published George's Secret Key to the Universe, a children's book designed to explain theoretical physics in an accessible fashion and featuring characters similar to those in the Hawking family.{{sfn|Ferguson|2011|pp=230–231}} The book was followed by sequels in 2009, 2011, 2014 and 2016.In 2002, following a UK-wide vote, the BBC included Hawking in their list of the 100 Greatest Britons.WEB, 21 August 2002, 100 great British heroes,weblink BBC News, 10 May 2016,weblink" title="">weblink 4 November 2010, live, He was awarded the Copley Medal from the Royal Society (2006), the Presidential Medal of Freedom, which is America's highest civilian honour (2009), and the Russian Special Fundamental Physics Prize (2013).Several buildings have been named after him, including the Stephen W. Hawking Science Museum in San Salvador, El{{nbsp}}Salvador, the Stephen Hawking Building in Cambridge, and the Stephen Hawking Centre at the Perimeter Institute in Canada. Appropriately, given Hawking's association with time, he unveiled the mechanical "Chronophage" (or time-eating) Corpus Clock at Corpus Christi College, Cambridge in September 2008.{{sfn|Ferguson|2011|pp=237–38}}During his career, Hawking supervised 39 successful PhD students. One doctoral student did not successfully complete the PhD.{{better source|date=August 2018}} As required by Cambridge University regulations, Hawking retired as Lucasian Professor of Mathematics in 2009. Despite suggestions that he might leave the United Kingdom as a protest against public funding cuts to basic scientific research,{{sfn|Ferguson|2011|pp=238–39}} Hawking worked as director of research at the Cambridge University Department of Applied Mathematics and Theoretical Physics.On 28 June 2009, as a tongue-in-cheek test of his 1992 conjecture that travel into the past is effectively impossible, Hawking held a party open to all, complete with hors d'oeuvres and iced champagne, but publicised the party only after it was over so that only time-travellers would know to attend; as expected, nobody showed up to the party.NEWS, Billings, Lee, Time Travel Simulation Resolves 'Grandfather Paradox',weblink 2 September 2016, Scientific American, 2 September 2014,weblink" title="">weblink 4 September 2016, live, On 20 July 2015, Hawking helped launch Breakthrough Initiatives, an effort to search for extraterrestrial life.NEWS, Katz, Gregory, Searching for ET: Hawking to look for extraterrestrial life,weblink 20 July 2015, Associated Press, 20 July 2015,weblink" title="">weblink 22 July 2015, live, Hawking created Stephen Hawking: Expedition New Earth, a documentary on space colonisation, as a 2017 episode of Tomorrow's World.NEWS, Tomorrow's World returns to BBC with startling warning from Stephen Hawking – we must leave Earth,weblink 5 May 2017, The Telegraph, 2 May 2017,weblink" title="">weblink 5 May 2017, live, NEWS, Stephen Hawking will test his theory that humans must leave Earth. Let's hope he's wrong.,weblink 5 May 2017, USA Today, 4 May 2017,weblink 4 May 2017, live, In August 2015, Hawking said that not all information is lost when something enters a black hole and there might be a possibility to retrieve information from a black hole according to his theory.WEB, Stephen Hawking says he has a way to escape from a black hole,weblink New Scientist, 31 May 2017,weblink 8 January 2017, live, In July 2017, Hawking was awarded an Honorary Doctorate from Imperial College London.WEB,weblink Stephen Hawking awarded Imperial College London's highest honour, Imperial College London, 19 July 2017,weblink" title="">weblink 14 March 2018, live, Hawking's final paper – A smooth exit from eternal inflation? – was posthumously published in the Journal of High Energy Physics on 27 April 2018.JOURNAL, Hawking, S. W., Hertog, Thomas, April 2018, A smooth exit from eternal inflation?, Journal of High Energy Physics, en, 2018, 4, 147, 10.1007/jhep04(2018)147, 1029-8479, 2018JHEP...04..147H, 1707.07702, NEWS,weblink Hawking's last paper co-authored with ERC grantee posits new cosmology, EurekAlert!, 2 May 2018, 3 May 2018,weblink 2 May 2018, live, {{clear}}

Personal life


Hawking met his future wife, Jane Wilde, at a party in 1962. The following year, Hawking was diagnosed with motor neuron disease. In October 1964, the couple became engaged to marry, aware of the potential challenges that lay ahead due to Hawking's shortened life expectancy and physical limitations.{{sfn|Larsen|2005|p=xiv}}{{sfn|Ferguson|2011|pp=37–40}} Hawking later said that the engagement gave him "something to live for".{{sfn|Ferguson|2011|p=40}} The two were married on 14 July 1965 in their shared hometown of St Albans.{{sfn|Ferguson|2011|pp=43–44}}The couple resided in Cambridge, within Hawking's walking distance to the Department of Applied Mathematics and Theoretical Physics (DAMTP). During their first years of marriage, Jane lived in London during the week as she completed her degree at Westfield College. They travelled to the United States several times for conferences and physics-related visits. Jane began a PhD programme through Westfield College in medieval Spanish poetry (completed in 1981). The couple had three children: Robert, born May 1967,{{sfn|Ferguson|2011|pp=45–47}}{{sfn|White|Gribbin|2002|pp=92–98}} Lucy, born November 1969,{{sfn|Ferguson|2011|p=65}} and Timothy, born April 1979.{{sfn|Ferguson|2011|p=92}}Hawking rarely discussed his illness and physical challenges, even{{snd}}in a precedent set during their courtship{{snd}}with Jane.{{sfn|Ferguson|2011|pp=37–39, 77}} His disabilities meant that the responsibilities of home and family rested firmly on his wife's increasingly overwhelmed shoulders, leaving him more time to think about physics.{{sfn|Ferguson|2011|p=78}} Upon his appointment in 1974 to a year-long position at the California Institute of Technology in Pasadena, California, Jane proposed that a graduate or post-doctoral student live with them and help with his care. Hawking accepted, and Bernard Carr travelled with them as the first of many students who fulfilled this role.{{sfn|Ferguson|2011|pp=82–83}} The family spent a generally happy and stimulating year in Pasadena.{{sfn|Ferguson|2011|pp=83–88}}Hawking returned to Cambridge in 1975 to a new home and a new job, as reader. Don Page, with whom Hawking had begun a close friendship at Caltech, arrived to work as the live-in graduate student assistant. With Page's help and that of a secretary, Jane's responsibilities were reduced so she could return to her doctoral thesis and her new interest in singing.{{sfn|Ferguson|2011|pp = 89–90}}Around December 1977, Jane met organist Jonathan Hellyer Jones when singing in a church choir. Hellyer Jones became close to the Hawking family, and by the mid-1980s, he and Jane had developed romantic feelings for each other.{{sfn|Ferguson|2011|p=91}}{{sfn|Larsen|2005|pp=xiv, 79}}{{sfn|Hawking|2007|pp=279–80}} According to Jane, her husband was accepting of the situation, stating "he would not object so long as I continued to love him".{{sfn|Ferguson|2011|p=91}}{{sfn|Larsen|2005|p=79}}{{sfn|Hawking|2007|p=285}} Jane and Hellyer Jones determined not to break up the family, and their relationship remained platonic for a long period.{{sfn|Ferguson|2011|pp=91–92}}By the 1980s, Hawking's marriage had been strained for many years. Jane felt overwhelmed by the intrusion into their family life of the required nurses and assistants.{{sfn|Ferguson|2011|pp = 164–65}} The impact of his celebrity was challenging for colleagues and family members, while the prospect of living up to a worldwide fairytale image was daunting for the couple.{{sfn|Ferguson|2011|p = 185}} Hawking's views of religion also contrasted with her strong Christian faith and resulted in tension.{{sfn|Ferguson|2011|pp = 80–81}} After a tracheotomy in 1985, Hawking required a nurse 24/7 and nursing care was split across 3 shifts daily. In the late 1980s, Hawking grew close to one of his nurses, Elaine Mason, to the dismay of some colleagues, caregivers, and family members, who were disturbed by her strength of personality and protectiveness.{{sfn|Ferguson|2011|p = 145}} In February 1990, Hawking told Jane that he was leaving her for Mason,{{sfn|Ferguson|2011|p = 165}} and departed the family home.{{sfn|Larsen|2005|pp = x–xix}} After his divorce from Jane in 1995, Hawking married Mason in September,{{sfn|Ferguson|2011|pp = 186–87}}{{sfn|Larsen|2005|pp = x–xix}} declaring, "It's wonderful{{snd}}I have married the woman I love."{{sfn|Ferguson|2011|p = 187}}In 1999, Jane Hawking published a memoir, Music to Move the Stars, describing her marriage to Hawking and its breakdown. Its revelations caused a sensation in the media but, as was his usual practice regarding his personal life, Hawking made no public comment except to say that he did not read biographies about himself.{{sfn|Ferguson|2011|pp=187, 192}} After his second marriage, Hawking's family felt excluded and marginalised from his life. For a period of about five years in the early 2000s, his family and staff became increasingly worried that he was being physically abused.{{sfn|Ferguson|2011|pp=197, 225}} Police investigations took place, but were closed as Hawking refused to make a complaint.In 2006, Hawking and Mason quietly divorced,{{sfn|Ferguson|2011|p=225}} and Hawking resumed closer relationships with Jane, his children, and his grandchildren.{{sfn|Ferguson|2011|p=225}} Reflecting on this happier period, a revised version of Jane's book, re-titled Travelling to Infinity: My Life with Stephen, appeared in 2007, and was made into a film, The Theory of Everything, in 2014.NEWS, Eddie Redmayne wins first Oscar for 'Theory of Everything',weblink 7 March 2015, Reuters, 10 May 2016,weblink 1 December 2017, live,


Hawking had a rare early-onset slow-progressing form of motor neurone disease (MND; also known as amyotrophic lateral sclerosis, "ALS", or Lou Gehrig's disease), a terminal illness that affects and causes the degeneration of motor neurons of the brain and spinal cord, which gradually paralysed him over decades.Hawking had experienced increasing clumsiness during his final year at Oxford, including a fall on some stairs and difficulties when rowing.{{sfn|Ferguson|2011|p=32}} The problems worsened, and his speech became slightly slurred and his family noticed the changes when he returned home for Christmas, and medical investigations were begun.{{sfn|White|Gribbin|2002|p=59}}{{sfn|Ferguson|2011|pp=34–35}} The MND diagnosis came when Hawking was 21, in 1963. At the time, doctors gave him a life expectancy of two years.{{sfn|Larsen|2005|pp=18–19}}{{sfn|White|Gribbin|2002|pp=59–61}}In the late 1960s, Hawking's physical abilities declined: he began to use crutches and could no longer give lectures regularly.{{sfn|Ferguson|2011|pp=48–49}} As he slowly lost the ability to write, he developed compensatory visual methods, including seeing equations in terms of geometry.{{sfn|Ferguson|2011|pp=76–77}}{{sfn|White|Gribbin|2002|pp=124–25}} The physicist Werner Israel later compared the achievements to Mozart composing an entire symphony in his head.{{sfn|White|Gribbin|2002|p=124}} Hawking was fiercely independent and unwilling to accept help or make concessions for his disabilities. He preferred to be regarded as "a scientist first, popular science writer second, and, in all the ways that matter, a normal human being with the same desires, drives, dreams, and ambitions as the next person."{{sfn|White|Gribbin|2002|p=viii}} His wife, Jane Hawking, later noted: "Some people would call it determination, some obstinacy. I've called it both at one time or another."{{sfn|Ferguson|2011|p=48}} He required much persuasion to accept the use of a wheelchair at the end of the 1960s,{{sfn|White|Gribbin|2002|p=117}} but ultimately became notorious for the wildness of his wheelchair driving.{{sfn|Ferguson|2011|p=162}} Hawking was a popular and witty colleague, but his illness, as well as his reputation for brashness, distanced him from some.{{sfn|Ferguson|2011|p=48}}When Hawking first began using a wheelchair in the late 1970s he was using standard motorised models. The earliest surviving example of these chairs was made by BEC Mobility and sold by Christie's in November 2018 for £296,750.WEB,weblink A motorised wheelchair, November 2018, 18 June 2019, Hawking continued to use this type of chair until the early 1990s, at which time his ability to use his hands to drive a wheelchair deteriorated. Hawking used a variety of different chairs from that time, including a DragonMobility Dragon elevating powerchair from 2007, as shown in the April 2008 photo of Hawking attending NASA's 50th anniversary;WEB,weblink NASA Lecture Series – Dr. Stephen Hawking, 21 April 2008, 18 June 2019, a Permobil C350 from 2014; and then a Permobil F3 from 2016.NEWS,weblink Stephen Hawking’s powerchair provider Permobil pays tribute to physics titan, 15 March 2018, 18 June 2019, Hawking's speech deteriorated, and by the late 1970s he could be understood by only his family and closest friends. To communicate with others, someone who knew him well would interpret his speech into intelligible speech.{{sfn|Ferguson|2011|pp=81–82}} Spurred by a dispute with the university over who would pay for the ramp needed for him to enter his workplace, Hawking and his wife campaigned for improved access and support for those with disabilities in Cambridge,{{sfn|Mialet|2003|pp=450–51}}{{sfn|Ferguson|2011|pp=79, 149}} including adapted student housing at the university.{{sfn|White|Gribbin|2002|pp=273–74}} In general, Hawking had ambivalent feelings about his role as a disability rights champion: while wanting to help others, he also sought to detach himself from his illness and its challenges.{{sfn|White|Gribbin|2002|pp=193–94}} His lack of engagement in this area led to some criticism.{{sfn|White|Gribbin|2002|p=194}}During a visit to CERN on the border of France and Switzerland in mid-1985, Hawking contracted pneumonia, which in his condition was life-threatening; he was so ill that Jane was asked if life support should be terminated. She refused, but the consequence was a tracheotomy, which required round-the-clock nursing care and the removal of what remained of his speech.{{sfn|Ferguson|2011|pp=135–36}}{{sfn|White|Gribbin|2002|pp=232–36}} The National Health Service was ready to pay for a nursing home, but Jane was determined that he would live at home. The cost of the care was funded by an American foundation.{{sfn|Ferguson|2011|pp=136–37}}{{sfn|White|Gribbin|2002|pp=235–36}} Nurses were hired for the three shifts required to provide the round-the-clock support he required. One of those employed was Elaine Mason, who was to become Hawking's second wife.{{sfn|Ferguson|2011|p=139}}For his communication, Hawking initially raised his eyebrows to choose letters on a spelling card,{{sfn|Ferguson|2011|p=136}} but in 1986 he received a computer program called the "Equalizer" from Walter Woltosz, CEO of Words Plus, who had developed an earlier version of the software to help his mother-in-law, who also suffered from ALS and had lost her ability to speak and write. In a method he used for the rest of his life, Hawking could now simply press a switch to select phrases, words or letters from a bank of about 2,500–3,000 that were scanned.{{sfn|Ferguson|2011|pp=137–38}}{{sfn|White|Gribbin|2002|pp=236–37}} The program was originally run on a desktop computer. Elaine Mason's husband, David, a computer engineer, adapted a small computer and attached it to his wheelchair.{{sfn|Ferguson|2011|p=140}}Released from the need to use somebody to interpret his speech, Hawking commented that "I can communicate better now than before I lost my voice."{{sfn|Ferguson|2011|pp=140–41}} The voice he used had an American accent and is no longer produced.{{sfn|Ferguson|2011|p=138}} Despite the later availability of other voices, Hawking retained this original voice, saying that he preferred it and identified with it. Originally, Hawking activated a switch using his hand and could produce up to 15 words a minute.{{sfn|Ferguson|2011|p=137}} Lectures were prepared in advance and were sent to the speech synthesizer in short sections to be delivered.{{sfn|Ferguson|2011|p=138}}Hawking gradually lost the use of his hand, and in 2005 he began to control his communication device with movements of his cheek muscles,{{sfn|Ferguson|2011|p=224}} with a rate of about one word per minute. With this decline there was a risk of his developing locked-in syndrome, so Hawking collaborated with Intel researchers on systems that could translate his brain patterns or facial expressions into switch activations. After several prototypes that did not perform as planned, they settled on an adaptive word predictor made by the London-based startup SwiftKey, which used a system similar to his original technology. Hawking had an easier time adapting to the new system, which was further developed after inputting large amounts of Hawking's papers and other written materials and uses predictive software similar to other smartphone keyboards.NEWS,weblink How Intel Gave Stephen Hawking a Voice, Joao, Medeiros, 13 January 2015, Wired (magazine), Wired, 14 March 2018,weblink 14 March 2018, live, By 2009, he could no longer drive his wheelchair independently, but the same people who created his new typing mechanics were working on a method to drive his chair using movements made by his chin. This proved difficult, since Hawking could not move his neck, and trials showed that while he could indeed drive the chair, the movement was sporadic and jumpy.{{sfn|Ferguson|2011|p=240}} Near the end of his life, Hawking experienced increased breathing difficulties, often resulting in his requiring the usage of a ventilator, and being regularly hospitalised.

Disability outreach

Starting in the 1990s, Hawking accepted the mantle of role model for disabled people, lecturing and participating in fundraising activities.{{sfn|Ferguson|2011|pp=164, 178}} At the turn of the century, he and eleven other luminaries signed the Charter for the Third Millennium on Disability, which called on governments to prevent disability and protect the rights of the disabled.{{sfn|Ferguson|2011|p=196}} In 1999, Hawking was awarded the Julius Edgar Lilienfeld Prize of the American Physical Society.In August 2012, Hawking narrated the "Enlightenment" segment of the 2012 Summer Paralympics opening ceremony in London. In 2013, the biographical documentary film Hawking, in which Hawking himself is featured, was released. In September 2013, he expressed support for the legalisation of assisted suicide for the terminally ill. In August 2014, Hawking accepted the Ice Bucket Challenge to promote ALS/MND awareness and raise contributions for research. As he had pneumonia in 2013, he was advised not to have ice poured over him, but his children volunteered to accept the challenge on his behalf.

Plans for a trip to space

File:Physicist Stephen Hawking in Zero Gravity NASA.jpg|alt=Hawking, without his wheelchair, floating weightless in the air inside a plane|thumb|upright=1.15|Hawking taking a zero-gravity flight in a reduced-gravity aircraftreduced-gravity aircraftIn late 2006, Hawking revealed in a BBC interview that one of his greatest unfulfilled desires was to travel to space; on hearing this, Richard Branson offered a free flight into space with Virgin Galactic, which Hawking immediately accepted. Besides personal ambition, he was motivated by the desire to increase public interest in spaceflight and to show the potential of people with disabilities. On 26 April 2007, Hawking flew aboard a specially-modified Boeing 727-200 jet operated by Zero-G Corp off the coast of Florida to experience weightlessness.{{sfn|Ferguson|2011|pp=232–33}} Fears the manoeuvres would cause him undue discomfort proved groundless, and the flight was extended to eight parabolic arcs. It was described as a successful test to see if he could withstand the g-forces involved in space flight.NEWS,weblink Branson to help Hawking live space dream, Leonard, T., Osborne, A., 27 April 2007, The Telegraph, 15 March 2018,weblink 16 March 2018, live, dmy-all, At the time, the date of Hawking's trip to space was projected to be as early as 2009, but commercial flights to space did not commence before his death.WEB,weblink Stephen Hawking felt freedom of weightlessness during KSC visit, Dean, James, 14 March 2018, USA Today, 15 March 2018,weblink 15 March 2018, live, dmy-all,


Hawking died at his home in Cambridge, England, on 14 March 2018, at the age of 76.JOURNAL, Rees, Martin, Stephen Hawking (1942–2018) World-renowned physicist who defied the odds, Nature (journal), Nature, 555, 7697, 2018, 444, 0028-0836, 10.1038/d41586-018-02839-9, 29565379, Martin Rees, 2018Natur.555..444R, NEWS, Overbye, Dennis, Dennis Overbye, Stephen Hawking Dies at 76; His Mind Roamed the Cosmos,weblink 14 March 2018, The New York Times, 14 March 2018,weblink 14 March 2018, live, NEWS,weblink 'Mind over matter': Stephen Hawking, Penrose, Roger, 14 March 2018, The Guardian, 14 March 2018,weblink 14 March 2018, live, His family stated that he "died peacefully".WEB,weblink Karma, Allen, Stephen Hawking, author of 'A Brief History of Time,' dies at 76, 14 March 2018, ABC News, 14 March 2018,weblink" title="">weblink 14 March 2018, live, NEWS,weblink Physicist Stephen Hawking dies after living with ALS for 50-plus years, Robert, Barr, San Francisco Chronicle, 14 March 2018,weblink 14 March 2018, live, He was eulogised by figures in science, entertainment, politics, and other areas.NEWS, Overbye, Dennis, Dennis Overbye, Stephen Hawking's Beautiful Mind,weblink 14 March 2018, The New York Times, 15 March 2018,weblink 14 March 2018, live, NEW, Mlodinow, Leonard, Leonard Mlodinow, Stephen Hawking, Force of Nature,weblink 14 March 2018, The New York Times, 14 March 2018,weblink 15 March 2018, live, NEWS,weblink 'We lost a great one today': World reacts to Stephen Hawking's death on social media, Benjamin, Brown, Fox News Channel, 14 March 2018,weblink" title="">weblink 14 March 2018, live, NEWS, 14 March 2018, Stephen Hawking: Tributes pour in for 'inspirational' physicist,weblink BBC News, 14 March 2018,weblink" title="">weblink 14 March 2018, live, The Gonville and Caius College flag flew at half-mast and a book of condolences was signed by students and visitors.NEWS, Marsh, Sarah, 14 March 2018, Cambridge colleagues pay tribute to 'inspirational' Hawking,weblink The Guardian, 14 March 2018,weblink 14 March 2018, live, NEWS, 14 March 2018, Queue of people sign book of condolence at Stephen Hawking's former college,weblink BT News, Press Association, 14 March 2018,weblink" title="">weblink 15 March 2018, live, NEWS, Overbye, Dennis, Dennis Overbye, Stephen Hawking Taught Us a Lot About How to Live,weblink 15 March 2018, The New York Times, 15 March 2018,weblink 14 March 2018, live, A tribute was made to Hawking in the closing speech by IPC President Andrew Parsons at the closing ceremony of the 2018 Paralympic Winter Games in Pyeongchang, South Korea.NEWS,weblink IPC to Pay Tribute to Stephen Hawking During PyeongChang Paralympics Closing Ceremony, administrator, 20 March 2018, en-US,weblink 20 March 2018, live, Hawking was born on the 300th anniversary of Galileo's death and died on the 139th anniversary of Einstein's birth.{{sfn|Larsen|2005|p=51}} His private funeral took place at 2 pm on the afternoon of 31 March 2018, at Great St Mary's Church, Cambridge.NEWS, Elliott, Chris, The day Cambridge said goodbye to Stephen Hawking – one of our city's greatest ever academics,weblink 31 March 2018, Cambridge News, 31 March 2018,weblink 31 March 2018, live, NEWS, The Associated Press, At Stephen Hawking Funeral, Eddie Redmayne and Astronomer Royal Give Readings,weblink 31 March 2018, The New York Times, 31 March 2018,weblink 31 March 2018, live, Guests at the funeral included The Theory of Everything actors Eddie Redmayne and Felicity Jones, Queen guitarist and astrophysicist Brian May, and model Lily Cole.Prof Stephen Hawking funeral: Legacy 'will live forever' {{Webarchive|url= |date=18 June 2018 }}. BBC News. Published 31 March 2018. Retrieved 31 March 2018.WEB,weblink Famous guests attend Prof Stephen Hawking's funeral, 28 February 2019,weblink 28 February 2019, live, In addition, actor Benedict Cumberbatch, who played Hawking in Hawking, astronaut Tim Peake, Astronomer Royal Martin Rees and physicist Kip Thorne provided readings at the service.WEB,weblink Benedict Cumberbatch to take lead role in Stephen Hawking memorial service, 28 February 2019,weblink 28 February 2019, live, Following the cremation, a service of thanksgiving was held at Westminster Abbey on 15 June 2018, after which his ashes were interred in the Abbey's nave, between the graves of Sir Isaac Newton and Charles Darwin.WEB,weblink Professor Stephen Hawking to be honoured at the Abbey – Westminster Abbey, PixelToCode,, 20 March 2018,weblink" title="">weblink 29 March 2018, live, NEWS, Castle, Stephen, Stephen Hawking Enters 'Britain’s Valhalla,’ Where Space Is Tight,weblink 21 July 2019, The New York Times, 15 June 2018, when Stephen Hawking’s ashes were interred there on Friday, they were placed between the remains of Isaac Newton and Charles Darwin, Inscribed on his memorial stone are the words "Here lies what was mortal of Stephen Hawking 1942–2018" and his most famed equation.NEWS,weblink Stephen Hawking's Ashes Buried in Westminster Abbey, The Hollywood Reporter, 16 June 2018,weblink 16 June 2018, live, He directed, at least fifteen years before his death, that the Bekenstein–Hawking entropy equation be his epitaph.{{citation|newspaper=Telegraph Media Group|title=A simple formula that will make a fitting epitaph|author=Roger Highfield|date=20 February 2002|url=|author-link=Roger Highfield (historian)|access-date=16 March 2018|archive-url=|archive-date=18 March 2018|url-status=live}}{{citation|first=Stuart|last=Clark|authorlink=Stuart Clark (author)|year=2016|title=The Unknown Universe|publisher=Pegasus|isbn=978-1-68177-153-3|p=281}}{{refn|group=note|By considering the effect of a black hole's event horizon on virtual particle production, Hawking found in 1974, much to his surprise, that black holes emit black-body radiation associated with a temperature which can be expressed (in the nonspinning case) as:
T = frac{hbar c^3}{8 pi G M k},
where T is black hole temperature, hbar is Planck's constant divided by 2 pi, c is Einstein's speed of light, G is Newton's gravitational constant, M is the mass of the black hole, and k is Boltzmann's constant. This relationship between concepts from the disparate fields of general relativity, quantum mechanics and thermodynamics implies the existence of deep connections between them and may presage their unification. It is inscribed on Hawking's memorial stone.WEB,weblink Stephen Hawking's farewell: As his ashes were buried, his voice was beamed into space, Bever, Lindsey, 15 June 2018, Washington Post, 31 July 2018,weblink 31 July 2018, live, dmy-all, The equation's most fundamental implication can be obtained as follows. According to thermodynamics, this temperature is associated with an entropy, S, such that T = M c^2/2 S, where M c^2 is the energy of a (nonspinning) black hole as expressed with Einstein's formula.BOOK, Walecka, John Dirk, Introduction to General Relativity,weblink 2007, World Scientific, 978-981-270-584-6, 305, Combining equations then gives:
S = frac{4 pi G M^2 k}{hbar c}.
Now, the radius of a nonspinning black hole is given by r = frac{2 G M}{c^2}, and since its surface area is just A = 4 pi r^2, S can be expressed in terms of surface area as:NEWS, Griffin, Andrew, Stephen Hawking death: The equation the professor asked to be put on his tombstone,weblink 17 March 2018, The Independent (UK), The Independent, 14 March 2018,weblink" title="">weblink 17 March 2018, live,
S_text{BH} = frac{k c^3}{4 hbar G} A,
where the subscript BH stands for either "black hole" or "Bekenstein–Hawking". This can be expressed more simply as a proportionality between two dimensionless ratios:
frac{S_text{BH}}{k} = frac{1}{4} frac{A}{A_text{P}},
where A_text{P} = hbar G / c^3 is the Planck area (the unit of area in quantum mechanics). Use of Planck units (in which k and A_text{P} are set to unity) reduces it further to:
S_text{BH} = frac{A}{4}.
Jacob Bekenstein had conjectured the proportionality; Hawking confirmed it and established the constant of proportionality at 1/4. Calculations based on string theory, first carried out in 1995, have been found to yield the same result.JOURNAL, Strominger, A., Vafa, C., Microscopic origin of the Bekenstein-Hawking entropy, Physics Letters B, 379, 1–4, 99–104, 1996, 10.1016/0370-2693(96)00345-0, hep-th/9601029, 1996PhLB..379...99S, This relationship is conjectured to be valid not just for black holes, but also (since entropy is proportional to information) as an upper bound on the amount of information that can be contained in any volume of space, which has in turn spawned deeper reflections on the possible nature of reality.}} In June 2018, it was announced that Hawking's words, set to music by Greek composer Vangelis, would be beamed into space from a European space agency satellite dish in Spain with the aim of reaching the nearest black hole, 1A 0620-00.NEWS, Stephen Hawking's words will be beamed into space,weblink 20 October 2018, BBC,weblink 22 October 2018, live, Hawking's final broadcast interview, about the detection of gravitational waves resulting from the collision of two neutron stars, occurred in October 2017.NEWS, Ghosh, Pallab, Stephen Hawking's final interview: A beautiful Universe,weblink 26 March 2018, BBC news, 26 March 2018,weblink" title="">weblink 26 March 2018, live, His final words to the world appeared posthumously, in April 2018, in the form of a Smithsonian TV Channel documentary entitled, Leaving Earth: Or How to Colonize a Planet.NEWS, Taylor, Dan, Stephen Hawking's incredible last words will stun you,weblink 24 March 2018,, 24 March 2018,weblink 25 March 2018, live, WEB, Tasoff, Harrison, 4 Smithsonian Space Documentaries You Don't Want to Miss,weblink 13 March 2018,, 24 March 2018,weblink 25 March 2018, live, One of his final research studies, entitled A smooth exit from eternal inflation?, about the origin of the universe, was published in the Journal of High Energy Physics in May 2018.WEB, Staff (University of Cambridge), Taming the multiverse—Stephen Hawking's final theory about the big bang,weblink 2 May 2018,, 2 May 2018,weblink 2 May 2018, live, JOURNAL, Hawking, Stephen, Hertog, Thomas, Thomas Hertog, A smooth exit from eternal inflation? – abstract, 20 April 2018, Journal of High Energy Physics, 2018, 4, 147, 10.1007/JHEP04(2018)147, 1707.07702, 2018JHEP...04..147H, JOURNAL, Hawking, Stephen, Hertog, Thomas, Thomas Hertog, A smooth exit from eternal inflation? – full article, 20 April 2018, Journal of High Energy Physics, 2018, 4, 10.1007/JHEP04(2018)147, 1707.07702, 2018JHEP...04..147H, WEB, Starr, Michelle, Stephen Hawking's Final Theory About Our Universe Will Melt Your Brain,weblink 22 December 2018,, 22 December 2018,weblink 22 December 2018, live, Later, in October 2018, another of his final research studies, entitled Black Hole Entropy and Soft Hair,ARXIV, Haco, Sasha, Hawking, Stephen W., Perry, Malcolm J., Strominger, Andrew, Black Hole Entropy and Soft Hair, 9 October 2018, 1810.01847v2, hep-th, was published, and dealt with the "mystery of what happens to the information held by objects once they disappear into a black hole".WEB, Nield, David, The Very Last Paper Stephen Hawking Worked on Has Just Been Published Online – He continued the quest to understand black holes until the end.,weblink 12 October 2018,, 12 October 2018,weblink 12 October 2018, live, NEWS, Overbye, Dennis, Dennis Overbye, Stephen Hawking's Final Paper: How to Escape From a Black Hole – In a study from beyond the grave, the theoretical physicist sings (mathematically) of memory, loss and the possibility of data redemption.,weblink 23 October 2018, The New York Times, 23 October 2018,weblink 24 October 2018, live, Also in October 2018, Hawking's last book, Brief Answers to the Big Questions, a popular science book presenting his final comments on the most important questions facing humankind, was published.NEWS, AP News, In Posthumous Message, Hawking Says Science Under Threat,weblink 15 October 2018, The New York Times, 15 October 2018,weblink 16 October 2018, live, WEB, Staff, Brief Answers to the Big Questions – Hardcover – October 16, 2018 by Stephen Hawking,weblink 2018, Amazon (company), Amazon, 15 October 2018, On 8 November 2018, an auction of 22 personal possessions of Stephen Hawking, including his doctoral thesis ("Properties of Expanding Universes", PhD thesis, Cambridge University, 1965) and wheelchair, took place, and fetched about £1.8 m (more than $2.3 m).NEWS, Staff, Stephen Hawking personal effects fetch £1.8 m at auction,weblink 8 November 2018, BBC News, 8 November 2018,weblink 8 November 2018, live, NEWS, Fortin, Jacey, Stephen Hawking's Wheelchair and Thesis Fetch More Than $1 Million at Auction,weblink 8 November 2018, The New York Times, 8 November 2018,weblink 9 November 2018, live, Proceeds from the auction sale of the wheelchair went to two charities, the Motor Neurone Disease Association and the Stephen Hawking Foundation;WEB, Lawless, Jill, Stephen Hawking's wheelchair, thesis for sale,weblink 22 October 2018,, 22 October 2018,weblink 22 October 2018, live, proceeds from Hawking's other items went to his estate.In March 2019, it was announced that the Royal Mint issued a commemorative 50 pence coin in honour of Hawking.NEWS, McRae, Mike, UK Put a Black Hole on a 50p Coin to Honour Stephen Hawking, And It Looks Stunning,weblink 13 March 2019,, 13 March 2019,weblink 30 March 2019, live, The same month, it was reported that Hawking's nurse, Patricia Dowdy, had been handed an interim suspension in 2016 for "failures over his care and financial misconduct."NEWS,weblink Hawking's nurse struck off over his care, 12 March 2019, 12 March 2019, en-GB,weblink 12 March 2019, live,

Personal views

Future of humanity

File:Barack Obama speaks to Stephen Hawking (cropped).jpg|thumb|upright|alt=Photograph of Barack Obama talking to Stephen Hawking in the White House|President Barack Obama talks with Hawking in the White House before a ceremony presenting him with the Presidential Medal of FreedomPresidential Medal of FreedomIn 2006, Hawking posed an open question on the Internet: "In a world that is in chaos politically, socially and environmentally, how can the human race sustain another 100 years?", later clarifying: "I don't know the answer. That is why I asked the question, to get people to think about it, and to be aware of the dangers we now face."NEWS, Sample, Ian, 2 August 2006, The great man's answer to the question of human survival: Er, I don't know,weblink The Guardian, 14 March 2018,weblink 14 March 2018, live, Hawking expressed concern that life on Earth is at risk from a sudden nuclear war, a genetically engineered virus, global warming, or other dangers humans have not yet thought of.NEWS, Prof Stephen Hawking: disaster on planet Earth is a near certainty,weblink The Daily Telegraph, 2 April 2018,weblink 2 April 2018, live, Hawking stated: "I regard it as almost inevitable that either a nuclear confrontation or environmental catastrophe will cripple the Earth at some point in the next 1,000 years", and considered an "asteroid collision" to be the biggest threat to the planet.NEWS, Stanley-Becker, Isaac, Stephen Hawking feared race of 'superhumans' able to manipulate their own DNA,weblink 15 October 2018, The Washington Post, 15 October 2018,weblink 15 October 2018, live, Such a planet-wide disaster need not result in human extinction if the human race were to be able to colonise additional planets before the disaster. Hawking viewed spaceflight and the colonisation of space as necessary for the future of humanity.Hawking stated that, given the vastness of the universe, aliens likely exist, but that contact with them should be avoided. He warned that aliens might pillage Earth for resources. In 2010 he said, "If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans."Hawking warned that superintelligent artificial intelligence could be pivotal in steering humanity's fate, stating that "the potential benefits are huge... Success in creating AI would be the biggest event in human history. It might also be the last, unless we learn how to avoid the risks."NEWS, Hawking, Stephen, Tegmark, Mark, Wilczek, Frank, Stephen Hawking: 'Transcendence looks at the implications of artificial intelligence – but are we taking AI seriously enough?',weblink 1 May 2014, The Independent, 3 December 2014,weblink" title="">weblink 2 October 2015, live, NEWS, Stephen Hawking warns artificial intelligence could end mankind,weblink 3 December 2014, BBC News, 2 December 2014,weblink" title="">weblink 30 October 2015, live, However, he argued that we should be more frightened of capitalism exacerbating economic inequality than robots.NEWS, Stephan Hawking says we should be more frightened of capitalism than robots,weblink CNET, 14 April 2018,weblink 15 April 2018, live, Hawking was concerned about the future emergence of a race of "superhumans" that would be able to design their own evolution and, as well, argued that computer viruses in today's world should be considered a new form of life, stating that "maybe it says something about human nature, that the only form of life we have created so far is purely destructive. Talk about creating life in our own image."{{sfn|Ferguson|2011|p=179}}

Science vs. philosophy

At Google's Zeitgeist Conference in 2011, Hawking said that "philosophy is dead". He believed that philosophers "have not kept up with modern developments in science" and that scientists "have become the bearers of the torch of discovery in our quest for knowledge". He said that philosophical problems can be answered by science, particularly new scientific theories which "lead us to a new and very different picture of the universe and our place in it".

Religion and atheism

Hawking was an atheist and believed that "the universe is governed by the laws of science". He stated: "There is a fundamental difference between religion, which is based on authority, [and] science, which is based on observation and reason. Science will win because it works."WEB,weblink Stephen Hawking's Religion and Political Views, Hollowverse, 14 March 2018,weblink 14 March 2018, live, {{self-published inline|date=March 2018}} In an interview published in The Guardian, Hawking regarded "the brain as a computer which will stop working when its components fail", and the concept of an afterlife as a "fairy story for people afraid of the dark". In 2011, narrating the first episode of the American television series Curiosity on the Discovery Channel, Hawking declared:Hawking's association with atheism and freethinking was in evidence from his university years onwards, when he had been a member of Oxford University's humanist group. He was later scheduled to appear as the keynote speaker at a 2017 Humanists UK conference.WEB,weblink Humanists UK mourns death of Stephen Hawking, 18 March 2019, Humanists UK, 14 March 2019, In an interview with El Mundo, he said:}}In addition, Hawking stated:


Hawking was a longstanding Labour Party supporter.{{sfn|White|Gribbin|2002|p=195}}{{sfn|Ferguson|2011|p=223}} He recorded a tribute for the 2000 Democratic presidential candidate Al Gore,{{sfn|Ferguson|2011|p=195}} called the 2003 invasion of Iraq a "war crime",{{sfn|Ferguson|2011|p=223}} supported the academic boycott of Israel, campaigned for nuclear disarmament,{{sfn|White|Gribbin|2002|p=195}}{{sfn|Ferguson|2011|p=223}} and supported stem cell research,{{sfn|Ferguson|2011|p=223}} universal health care,{{sfn|Ferguson|2011|p=242}} and action to prevent climate change. In August 2014, Hawking was one of 200 public figures who were signatories to a letter to The Guardian expressing their hope that Scotland would vote to remain part of the United Kingdom in September's referendum on that issue. Hawking believed a United Kingdom withdrawal from the European Union (Brexit) would damage the UK's contribution to science as modern research needs international collaboration, and that free movement of people in Europe encourages the spread of ideas.NEWS, Radford, Tim, 31 May 2016,weblink Trump's popularity inexplicable and Brexit spells disaster, says Stephen Hawking, The Guardian, 31 May 2016,weblink 31 May 2016, live, Hawking was disappointed by Brexit and warned against envy and isolationism.NEWS,weblink Stephen Hawking's political views, 14 March 2018, 19 March 2018,, BBC News,weblink" title="">weblink 17 March 2018, live, Hawking was greatly concerned over health care, and maintained that without the UK National Health Service, he could not have survived into his 70s. He stated, "I have received excellent medical attention in Britain, and I felt it was important to set the record straight. I believe in universal health care. And I am not afraid to say so."Hawking feared privatisation. He stated, "The more profit is extracted from the system, the more private monopolies grow and the more expensive healthcare becomes. The NHS must be preserved from commercial interests and protected from those who want to privatise it."NEWS, Triggle, Nick, 19 August 2017, Stephen Hawking: I'm worried about the future of the NHS,weblink BBC News, 14 March 2018,weblink" title="">weblink 15 March 2018, live, Hawking alleged ministers damaged the NHS, he blamed the Conservatives for cutting funding, weakening the NHS by privatisation, lowering staff morale through holding pay back and reducing social care.NEWS, Campbell, Denis, 18 August 2017, Stephen Hawking blames Tory politicians for damaging NHS,weblink The Guardian, 14 March 2018,weblink 15 March 2018, live, Hawking accused Jeremy Hunt of cherry picking evidence which Hawking maintained debased science.NEWS, 20 August 2017,weblink Hawking v Hunt: What happened?, BBC News, 14 March 2018,weblink" title="">weblink 14 March 2018, live, Hawking also stated, "There is overwhelming evidence that NHS funding and the numbers of doctors and nurses are inadequate, and it is getting worse."NEWS, Kennedy, Maev, 27 August 2017, Jeremy Hunt continues war of words with Stephen Hawking over NHS,weblink The Guardian, 14 March 2018,weblink 15 March 2018, live, In June 2017, Hawking endorsed the Labour Party in the 2017 UK general election, citing the Conservatives' proposed cuts to the NHS. But he was also critical of Labour leader Jeremy Corbyn, expressing scepticism over whether the party could win a general election under him.NEWS, Stephen Hawking announces he is voting Labour: 'The Tories would be a disaster', Griffin, Andrew,weblink The Independent, 6 June 2017, 6 June 2017,weblink" title="">weblink 5 June 2017, live, Hawking feared Donald Trump's policies on global warming could endanger the planet and make global warming irreversible. He said, "Climate change is one of the great dangers we face, and it's one we can prevent if we act now. By denying the evidence for climate change, and pulling out of the Paris Agreement, Donald Trump will cause avoidable environmental damage to our beautiful planet, endangering the natural world, for us and our children."NEWS, Ghosh, Pallab, 2 July 2017, Hawking says Trump's climate stance could damage Earth,weblink BBC News, 14 March 2018,weblink" title="">weblink 14 March 2018, live, Hawking further stated that this could lead Earth "to become like Venus, with a temperature of two hundred and fifty degrees, and raining sulphuric acid".NEWS, Eleftheriou-Smith, Loulla-Mae, 3 July 2017, Stephen Hawking says Donald Trump could turn Earth into Venus-like planet with 250C and sulphuric acid rain,weblink The Independent, 14 March 2018,weblink" title="">weblink 19 March 2018, live,

Appearances in popular media

{{Further|Stephen Hawking in popular culture}}File:Monty Python Live 02-07-14 12 55 10 (14415565317).jpg|thumb|right|Hawking in Monty Python's “Galaxy Song” video at the comedy troupe's 2014 reunion show, Monty Python Live (Mostly)Monty Python Live (Mostly)In 1988, Hawking, Arthur C. Clarke and Carl Sagan were interviewed in God, the Universe and Everything Else. They discussed the Big Bang theory, God and the possibility of extraterrestrial life.NEWS, Watch this: 'God, the Universe and Everything Else' with Carl Sagan, Stephen Hawking and Arthur C. Clarke,weblink 19 August 2019, The Verge, At the release party for the home video version of the A Brief History of Time, Leonard Nimoy, who had played Spock on Star Trek, learned that Hawking was interested in appearing on the show. Nimoy made the necessary contact, and Hawking played a holographic simulation of himself in an episode of (Star Trek: The Next Generation) in 1993.{{sfn|Ferguson|2011|pp=177–78}}{{sfn|Larsen|2005|pp=93–94}} The same year, his synthesiser voice was recorded for the Pink Floyd song "Keep Talking",{{sfn|Larsen|2005|pp=xiii, 94}}{{sfn|Ferguson|2011|p=178}} and in 1999 for an appearance on The Simpsons.{{sfn|Ferguson|2011|p=192}} Hawking appeared in documentaries titled The Real Stephen Hawking (2001),{{sfn|Ferguson|2011|p=196}} Stephen Hawking: Profile (2002){{sfn|Ferguson|2011|p=221}} and Hawking (2013), and the documentary series Stephen Hawking, Master of the Universe (2008). Hawking also guest-starred in Futurama and had a recurring role in The Big Bang Theory.Hawking allowed the use of his copyrighted voiceBOOK, Mialet, Hélène, Hawking Incorporated: Stephen Hawking and the Anthropology of the Knowing Subject, 28 June 2012, 211,weblink 978-0-226-52226-5, NEWS, Edgar, James, 'Have you still got that American voice?' Queen asks Stephen Hawking, 30 May 2014, The Telegraph,weblink 12 July 2015,weblink" title="">weblink 6 August 2015, live, in the biographical 2014 film The Theory of Everything, in which he was portrayed by Eddie Redmayne in an Academy Award-winning role.WEB, Setoodeh, Ramin, How Eddie Redmayne Became Stephen Hawking in 'The Theory of Everything',weblink Variety, 24 February 2015, 28 October 2014,weblink" title="">weblink 26 February 2015, live, Hawking was featured at the Monty Python Live (Mostly) in 2014. He was shown to sing an extended version of the “Galaxy Song”, after running down Brian Cox with his wheelchair, in a pre-recorded video.NEWS, McAfee, Melonyce, Stephen Hawking sings Monty Python's 'Galaxy Song',weblink 12 January 2017, CNN, 14 April 2015,weblink" title="">weblink 13 January 2017, live, NEWS, Grow, Korry, Hear Stephen Hawking Sing Monty Python's 'Galaxy Song',weblink 12 January 2017, Rolling Stone, 14 April 2015,weblink" title="">weblink 13 January 2017, live, Hawking used his fame to advertise products, including a wheelchair,{{sfn|Ferguson|2011|p=196}} National Savings, British Telecom, Specsavers, Egg Banking, and Go Compare. In 2015, he applied to trademark his name.NEWS, Buchanan, Rose Troup, Professor Stephen Hawking to trademark name,weblink 2 April 2015, The Independent, 20 March 2015,weblink" title="">weblink 2 April 2015, live, Broadcast in March 2018 just a week or two before his death, Hawking was the voice of The Book Mark II on The Hitchhiker's Guide to the Galaxy radio series, and he was the guest of Neil deGrasse Tyson on StarTalk.WEB, Tufnell, Nicholas, The Hitchhikers Guide to the Galaxy' is back with the original cast,weblink 14 March 2018, CNET, 9 March 2018,weblink 15 March 2018, live, and WEB, StarTalk Season 4, Episode 20: Stephen Hawking, 4 March 2018,weblink National Geographic Partners, LLC, 14 March 2018,weblink" title="">weblink 15 March 2018, live,

Awards and honours

File:Stephen hawking and lucy hawking nasa 2008.jpg|thumb|upright=1.15|alt=Photograph of Hawking and his daughter Lucy on-stage at a presentation|Stephen Hawking being presented by his daughter Lucy Hawking at the lecture he gave for NASANASAHawking received numerous awards and honours. Already early in the list, in 1974 he was elected a Fellow of the Royal Society (FRS).JOURNAL, Carr, Bernard J., Ellis, George F. R., Gibbons, Gary W., 2019, Stephen William Hawking CH CBE. 8 January 1942—14 March 2018,weblink Biographical Memoirs of Fellows of the Royal Society, 66, 10.1098/rsbm.2019.0001, 267–308, At that time, his nomination read:The citation continues, "Other important work by Hawking relates to the interpretation of cosmological observations and to the design of gravitational wave detectors."Hawking received the 2015 BBVA Foundation Frontiers of Knowledge Award in Basic Sciences shared with Viatcheslav Mukhanov for discovering that the galaxies were formed from quantum fluctuations in the early Universe. At the 2016 Pride of Britain Awards, Hawking received the lifetime achievement award "for his contribution to science and British culture". After receiving the award from Prime Minister Theresa May, Hawking humorously requested that she not seek his help with Brexit.NEWS, Corkery, Claire, 1 November 2016, Pride of Britain 2016: Stephen Hawking makes Brexit joke at PM Theresa May's expense,weblink Express, 14 March 2018,weblink 15 March 2018, live,

Medal for Science Communication

Hawking was a member of the Advisory Board of the Starmus Festival, and had a major role in acknowledging and promoting science communication. The Stephen Hawking Medal for Science Communication is an annual award initiated in 2016 to honour members of the arts community for contributions that help build awareness of science.WEB,weblink Stephen Hawking Medals For Science Communication, STARMUS, 16 May 2017,weblink" title="">weblink 7 October 2016, live, Recipients receive a medal bearing a portrait of Hawking by Alexei Leonov, and the other side represents an image of Leonov himself performing the first spacewalk along with an image of the "Red Special", the guitar of Queen musician and astrophysicist Brian May (with music being another major component of the Starmus Festival)."Stephen Hawking medal". Starmus. Retrieved 19 August 2019The Starmus III Festival in 2016 was a tribute to Stephen Hawking and the book of all Starmus III lectures, "Beyond the Horizon", was also dedicated to him. The first recipients of the medals, which were awarded at the festival, were chosen by Hawking himself. They were composer Hans Zimmer, physicist Jim Al-Khalili, and the science documentary Particle Fever.WEB, Davis, Nicola, Winners of inaugural Stephen Hawking medal announced,weblink The Guardian, 16 June 2016, 19 August 2019,


Popular books



  • (Black Holes and Time Warps|Black Holes & Time Warps: Einstein's Outrageous Legacy) (Kip Thorne, and introduction by Frederick Seitz) (1994)

Children's fiction

Co-written with his daughter Lucy.

Films and series

Selected academic works

  • JOURNAL, Hawking, S.W., Penrose, R., The Singularities of Gravitational Collapse and Cosmology, Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 314, 1519, 1970, 529–548, 10.1098/rspa.1970.0021, 1970RSPSA.314..529H,
  • JOURNAL, Hawking, S., Gravitational Radiation from Colliding Black Holes, Physical Review Letters, 26, 21, 1971, 1344–1346, 10.1103/PhysRevLett.26.1344, 1971PhRvL..26.1344H,
  • JOURNAL, Hawking, S.W., Black holes in general relativity, Communications in Mathematical Physics, 25, 2, 1972, 152–166,weblink 10.1007/BF01877517, 1972CMaPh..25..152H, dead,weblink" title="">weblink 13 January 2012,
  • JOURNAL, Hawking, S.W., Black hole explosions?, Nature, 248, 5443, 1974, 30–31, 10.1038/248030a0, 1974Natur.248...30H,
  • JOURNAL, Hawking, S.W., The development of irregularities in a single bubble inflationary universe, Physics Letters B, 115, 4, 1982, 295–297, 10.1016/0370-2693(82)90373-2, 1982PhLB..115..295H,
  • JOURNAL, Hartle, J., Hawking, S., Wave function of the Universe, Physical Review D, 28, 12, 1983, 2960–2975, 10.1103/PhysRevD.28.2960, 1983PhRvD..28.2960H,
  • JOURNAL, Hawking, S.W., The Gravitational Hamiltonian in the Presence of Non-Orthogonal Boundaries, Classical and Quantum Gravity, 13, 10, 1996, 2735–2752, 10.1088/0264-9381/13/10/012, 1996CQGra..13.2735H, gr-qc/9603050,,
  • JOURNAL, Hawking, S., Information loss in black holes, Physical Review D, 72, 8, 084013, 2005, 10.1103/PhysRevD.72.084013, hep-th/0507171, 2005PhRvD..72h4013H,
  • JOURNAL, Hawking, S., Hertog, T., A smooth exit from eternal inflation?, Journal of High Energy Physics, 147, 4, 2018, 10.1007/JHEP04(2018)147, 1707.07702, 2018JHEP...04..147H,


{{subscription required}}{{MathGenealogy|id=78459}}THESIS, PhD, Stephen William, Hawking, Properties of Expanding Universes, University of Cambridge, 1966,weblink Stephen Hawking, 62793673, 10.17863/CAM.11283, {{EThOS|}} {{free access}}THESIS, PhD, Bruce, Allen, Vacuum energy and general relativity, University of Cambridge, 1983,weblink Bruce Allen (physicist), 5 February 2014,weblink" title="">weblink 25 January 2016, live, THESIS, PhD, Raphael, Bousso, Pair creation of black holes in cosmology, University of Cambridge, 1997,weblink Raphael Bousso, 5 February 2014,weblink" title="">weblink 25 January 2016, live, THESIS, PhD, Bernard John, Carr, Primordial black holes, University of Cambridge, 1976,weblink Bernard Carr, 5 February 2014,weblink" title="">weblink 25 January 2016, live, THESIS, PhD, Helen Fay, Dowker, Space-time wormholes, University of Cambridge, 1991,weblink Fay Dowker, 5 February 2014,weblink" title="">weblink 25 January 2016, live, THESIS, PhD, Christophe Georges Gunnar Sven, Galfard, Black hole information & branes, University of Cambridge, 2006,weblink :fr:Christophe Galfard, 5 February 2014,weblink" title="">weblink 25 January 2016, live, THESIS, PhD, Gary William, Gibbons, Some aspects of gravitational radiation and gravitational collapse, University of Cambridge, 1973,weblink Gary Gibbons, 5 February 2014,weblink" title="">weblink 25 January 2016, live, THESIS, PhD, Thomas, Hertog, The origin of inflation, University of Cambridge, 2002,weblink :nl:Thomas Hertog, 5 February 2014,weblink" title="">weblink 25 January 2016, live, THESIS, PhD, Raymond, Laflamme, Time and quantum cosmology, University of Cambridge, 1988,weblink Raymond Laflamme, 5 February 2014,weblink" title="">weblink 25 January 2016, live, THESIS, PhD, Don Nelson, Page, Accretion into and emission from black holes, California Institute of Technology, 1976,weblink Don Page (physicist), 6 February 2014,weblink 21 February 2014, live, THESIS, PhD, Malcolm John, Perry, Black holes and quantum mechanics, University of Cambridge, 1978,weblink Malcolm Perry (physicist), 6 February 2014,weblink" title="">weblink 25 January 2016, live, THESIS, PhD, Zhongchao, Wu, Cosmological models and the inflationary universe, University of Cambridge, 1984,weblink Wu Zhongchao, 7 February 2014,weblink" title="">weblink 25 January 2016, live, WEB,weblink Certificate of election: Hawking, Stephen, EC/1974/12, The Royal Society, 4 February 2014,weblink London, dead, WEB,weblink Centre for Theoretical Cosmology: Outreach Stephen Hawking, University of Cambridge, 23 June 2013,weblink" title="">weblink 30 August 2015, live, WEB,weblink About Stephen, Stephen Hawking Official Website, 23 June 2013, dead,weblink" title="">weblink 30 August 2015, NEWS, 5 March 2012,weblink Dick Tahta, The Guardian, London, 5 January 2007, Hoare, Geoffrey, Love, Eric,weblink" title="">weblink 8 January 2014, live, NEWS, Donaldson, Gregg J., The Man Behind the Scientist,weblinkweblink" title="">weblink 11 May 2005, Tapping Technology, May 1999, 23 December 2012, JOURNAL, 10.1098/rspa.1970.0021, Stephen, Hawking, Penrose, Roger, 1970, The Singularities of Gravitational Collapse and Cosmology, (Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, Proceedings of the Royal Society A), 314, 1519, 529–548, 1970RSPSA.314..529H, WEB, Ridpath, Ian, Black hole explorer, New Scientist, 4 May 1978,weblink 9 January 2013,weblink 18 January 2017, live, BOOK, S.W., Hawking, W., Israel, Three Hundred Years of Gravitation,weblink 30 March 1989, 278, Astrophysical Black Holes, R.D. Blandford, Cambridge University Press, 978-0-521-37976-2, JOURNAL, Hawking, Stephen W., 1974, Black hole explosions?, Nature, 248, 5443, 30–31, 10.1038/248030a0, 1974Natur.248...30H, JOURNAL, Hawking, Stephen W., 1975, Particle creation by black holes, Communications in Mathematical Physics, 43, 3, 199–220, 10.1007/BF02345020, 1975CMaPh..43..199H,weblink 18 March 2018,weblink 18 March 2018, live, BOOK, Stephen, Hawking, Black Holes and Baby Universes and Other Essays,weblink 1994, Random House, 978-0-553-37411-7, 20, 23 February 2016,weblink 18 January 2017, live, NEWS,weblink Hawking gives up academic title, BBC News, 30 September 2009, 1 October 2009,weblink" title="">weblink 3 October 2009, live, BOOK, Leonard, Susskind, The Black Hole War: My Battle with Stephen Hawking to Make the World Safe for Quantum Mechanics,weblink 7 July 2008, Hachette Digital, Inc., 978-0-316-01640-7, 9, 18, 23 February 2016,weblink 18 January 2017, live, See Guth (1997) for a popular description of the workshop, or The Very Early Universe, {{isbn|0-521-31677-4}} eds Gibbons, Hawking & Siklos for a detailed report.JOURNAL, The development of irregularities in a single bubble inflationary universe, S.W., Hawking, Phys. Lett. B, 115, 295–297, 1982, 1982PhLB..115..295H, 10.1016/0370-2693(82)90373-2, 4, JOURNAL, 28, 2960–2975, 1983, 10.1103/PhysRevD.28.2960, Hartle, Physical Review D, J., Wave function of the Universe, Hawking, S., 12, 1983PhRvD..28.2960H, NEWS,weblink Stephen Hawking: 'There is no heaven; it's a fairy story', Sample, Ian, 15 May 2011, The Guardian, 17 May 2011,weblink" title="">weblink 20 September 2013, live, NEWS,weblink Getting Back the Gift of Gab: Next-Gen Handheld Computers Allow the Mute to Converse, Scientific American, 10 August 2009, Larry, Greenemeier, 11 September 2012,weblink" title="">weblink 12 May 2014, live, NEWS,weblink Stephen Hawking says pope told him not to study beginning of universe, 15 June 2006, USA Today, 12 December 2012,weblink" title="">weblink 30 August 2015, live, NEWS,weblink How God propelled Stephen Hawking into the bestsellers lists, The Guardian, 31 July 2009, 5 March 2012, Radford, Tim,weblink" title="">weblink 16 December 2013, live, NEWS,weblink Stephen Hawking: driven by a cosmic force of will, Roger, Highfield, The Daily Telegraph, 3 January 2012, London, 7 December 2012,weblink" title="">weblink 9 January 2015, live, NEWS,weblink Brief History of a first wife, Tim, Adams, The Observer, 4 April 2004, London, 12 February 2013,weblink 29 December 2016, live, WEB,weblink Black hole information bet, Hawking, S.W., Thorne, K.S., Preskill, Pasadena, California, 6 February 1997, 20 April 2013,weblink" title="">weblink 11 May 2013, live, JOURNAL, Hawking, S.W., 10.1103/PhysRevD.72.084013, Information loss in black holes, Physical Review D, 72, 8, 084013, 2005, hep-th/0507171, 2005PhRvD..72h4013H, WEB, John Preskill's comments about Stephen Hawking's concession,weblink 29 February 2012, John, Preskill,weblink" title="">weblink 26 February 2012, live, NEWS,weblink Call for global disability campaign, British Broadcasting Corporation, BBC, 8 September 1999, London, 12 February 2013,weblink" title="">weblink 12 December 2012, live, WEB,weblink Julius Edgar Lilienfeld Prize, American Physical Society, 29 August 2008,weblink" title="">weblink 26 October 2011, live, NEWS,weblink Welcome back to the family, Stephen, The Times, 6 May 2007, 6 May 2007,weblink" title="">weblink 3 December 2008, NEWS,weblink Police plan to ask Stephen Hawking about abuse claims, David, Harrison, The Daily Telegraph, 25 January 2004, London, 3 February 2013,weblink" title="">weblink 16 December 2013, live, NEWS,weblink Tim Adams talks to Jane Hawking about her ex husband Stephen, Tim, Adams, The Observer, 4 April 2004, London, 13 December 2016,weblink 29 December 2016, live, NEWS, Highfield, Roger, Stephen Hawking's explosive new theory, The Daily Telegraph, 26 June 2008,weblink 9 April 2012,weblink" title="">weblink 5 February 2015, live, JOURNAL, Hawking, S.W., Hertog, T., 10.1103/PhysRevD.73.123527, Populating the landscape: A top-down approach, Physical Review D, 73, 12, 123527, 2006, hep-th/0602091, 2006PhRvD..73l3527H,weblink 13 August 2018,weblink" title="">weblink 24 October 2017, live, NEWS, Hawking and second wife agree to divorce, The Daily Telegraph, 20 October 2006,weblink 18 March 2007, Sapsted, David,weblink" title="">weblink 18 September 2008, live, WEB, Books,weblink Stephen Hawking Official Website, 28 February 2012,weblink" title="">weblink 13 March 2012, live, NEWS,weblink Last night's TV: Stephen Hawking: Master of the Universe, Sam, Wollaston, The Guardian, 4 March 2008, London, 10 February 2013,weblink" title="">weblink 14 December 2013, live, NEWS, Professor Stephen Hawking films Big Bang Theory cameo,weblink 12 March 2012, BBC News, 12 March 2012,weblink" title="">weblink 14 March 2012, live, WEB,weblink Fonseca Prize 2008, University of Santiago de Compostela, 7 August 2009,weblink" title="">weblink 5 June 2009, live, NEWS, Stephen Hawking takes a hard line on aliens,weblink 24 February 2012, Leo, Hickman, 25 April 2010, The Guardian,weblink 1 January 2018, live, NEWS,weblink BBC News, Stephen Hawking warns over making contact with aliens, 25 April 2010, 24 May 2010,weblink" title="">weblink 12 May 2010, live, NEWS,weblink Stephen Hawking Plans Prelude to the Ride of His Life, Dennis, Overbye, The New York Times, 1 March 2007, New York Times Company, NYTC, New York, 9 February 2013,weblink" title="">weblink 10 May 2013, live, NEWS,weblink The Daily Telegraph, London, Colonies in space may be only hope, says Hawking, 16 October 2001, 5 August 2007, Highfield, Roger,weblink" title="">weblink 26 April 2009, live, NEWS,weblink Hawking takes zero-gravity flight, 27 April 2007, 17 June 2012, BBC News,weblink" title="">weblink 8 September 2012, live, NEWS,weblink Scientist Stephen Hawking decries Iraq war, USA Today, 3 November 2004, 18 February 2013,weblink" title="">weblink 14 October 2013, live, WEB,weblink Diplomacy and politics: Stephen Hawking reaffirms support of Israel boycott, 26 October 2014,weblink" title="">weblink 26 October 2014, live, NEWS, Kershner, Isabel, Stephen Hawking Joins Boycott Against Israel,weblink 8 May 2013, The New York Times, 8 May 2013,weblink" title="">weblink 9 May 2013, live, NEWS,weblink Prophet of Doomsday: Stephen Hawking, eco-warrior – Climate Change – Environment, Geoffrey, Lean, The Independent, 21 January 2007, London, 18 February 2013,weblink" title="">weblink 10 April 2014, live, NEWS,weblink Hawking urges EU not to stop stem cell funding, Debbie, Andalo, The Guardian, 24 July 2006, London, 18 February 2013,weblink" title="">weblink 30 August 2013, live, NEWS, Haurant, Sandra, Savings: Heavyweight celebrities endorse National Savings,weblink 25 February 2013, 3 June 2008,weblink" title="">weblink 2 September 2013, live, NEWS, Could Hawking's parody be sincerest form of flattery?,weblink Telegraph Media Group Limited, 19 February 2013, 13 June 2000,weblink" title="">weblink 10 January 2014, live, NEWS, Usborne, Simon, Stephen Hawking, Go Compare and a brief history of selling out,weblink The Independent, 19 February 2013, 1 January 2013,weblink" title="">weblink 25 February 2013, live, NEWS,weblink Why Some Physicists Bet Against the Higgs Boson, Robert, Wright, The Atlantic, 17 July 2012, 1 April 2013,weblink" title="">weblink 7 April 2013, live, NEWS,weblink Stephen Hawking loses Higgs boson particle bet – Video, The Guardian, 5 July 2012, London, 1 April 2013,weblink" title="">weblink 20 September 2013, live, NEWS,weblink Higgs boson breakthrough should earn physicist behind search Nobel Prize: Stephen Hawking, National Post, Agence France-Presse, 4 July 2012, 1 April 2013, NEWS,weblink The man who saves Stephen Hawking's voice, 30 December 2011, Catherine, de Lange, New Scientist, 18 June 2012,weblink 30 August 2015, live, WEB,weblink How researchers hacked into Stephen Hawking's brain, 25 June 2012, Alan, Boyle, NBC News, 29 September 2012, dead,weblink" title="">weblink 30 August 2015, NEWS,weblink Start-up attempts to convert Prof Hawking's brainwaves into speech, 7 July 2012, BBC, 29 September 2012,weblink" title="">weblink 3 November 2012, live, WEB,weblink Oldest, space-travelled, science prize awarded to Hawking, 24 August 2006, The Royal Society, 29 August 2008,weblink" title="">weblink 22 January 2015, live, NEWS,weblink Obama presents presidential medal of freedom to 16 recipients, The Guardian, London, 13 August 2009, 5 March 2012, Ewen, MacAskill,weblink" title="">weblink 7 September 2013, live, WEB, 2013 Fundamental Physics Prize Awarded to Alexander Polyakov,weblink Fundamental Physics Prize, 11 December 2012,weblink 19 January 2015, live, JOURNAL, Komar, Oliver, Buechner, Linda, The Stephen W. Hawking Science Museum in San Salvador Central America Honours the Fortitude of a Great Living Scientist, Journal of College Science Teaching, XXX, 2, October 2000,weblink 28 September 2008,weblink" title="">weblink 30 July 2009, NEWS,weblink The Stephen Hawking Building, 18 April 2007, 24 February 2012, BBC News,weblink" title="">weblink 23 March 2012, live, PRESS RELEASE, Grand Opening of the Stephen Hawking Centre at Perimeter Institute,weblink 6 June 2012, Perimeter Institute,weblink" title="">weblink 29 December 2012, live, WEB,weblink Time to unveil Corpus Clock,, 22 September 2008, 10 September 2015,weblink" title="">weblink 25 January 2016, live, NEWS,weblink Professor Stephen Hawking to stay at Cambridge University beyond 2012, The Daily Telegraph, 26 March 2010, London, 9 February 2013,weblink" title="">weblink 9 January 2014, live, WEB, Stephen Hawking – There is no God. There is no Fate,weblink 4 July 2013,weblink 16 August 2013, live, NEWS, Lowry, Brian, 4 August 2011, Curiosity: Did God Create the Universe?,weblink Variety, 14 March 2018,weblink" title="">weblink 14 March 2018, live, WEB, David Edwards, Stephen Hawking comes out: 'I'm an atheist' because science is 'more convincing' than God,weblink Raw Story, 25 September 2014, 24 September 2014,weblink" title="">weblink 26 July 2015, live, NEWS,weblink Stephen Hawking tells Google 'philosophy is dead', Matt, Warman, 17 May 2011, The Daily Telegraph, London, 17 June 2012,weblink" title="">weblink 9 June 2012, live, NEWS,weblink Paralympics: Games opening promises 'journey of discovery', BBC, 29 August 2012, 29 August 2012,weblink" title="">weblink 29 August 2012, live, NEWS, DeWitt, David, The Brilliance of His Universe,weblink 13 September 2013, The New York Times, 13 September 2013,weblink" title="">weblink 12 May 2014, live, NEWS, Duffin, Claire, We don't let animals suffer, says Prof Stephen Hawking, as he backs assisted suicide,weblink The Daily Telegraph, London, 17 September 2013, 14 March 2018,weblink 14 March 2018, live, WEB,weblink Celebrities' open letter to Scotland – full text and list of signatories, The Guardian, London, 7 August 2014, 26 August 2014,weblink" title="">weblink 17 August 2014, live, NEWS, Culzac, Natasha, 29 August 2014, Stephen Hawking, MND sufferer, does ice bucket challenge with a twist,weblink The Independent, 29 August 2014,weblink" title="">weblink 29 August 2014, live, WEB, Black Holes and Baby Universes,weblink 20 March 2010, Kirkus Reviews, 18 June 2012,weblink" title="">weblink 4 August 2012, live, WEB,weblink A Brief History of Time: Synopsis, Errol Morris, 18 June 2012,weblink" title="">weblink 29 June 2012, live, WEB,weblink Stephen Hawking's Universe, PBS, 26 June 2012,weblink" title="">weblink 6 May 2016, live, WEB,weblink The Hawking Paradox, BBC, 9 February 2012,weblink" title="">weblink 9 March 2012, live, NEWS,weblink "Masters of Science Fiction" too artistic for ABC, 7 December 2012, Richmond, Ray, Reuters, 3 August 2007,weblink 14 March 2018, live, NEWS, Walton, James, 4 March 2008, Last night on television: Stephen Hawking: Master of the Universe (Channel 4) – The Palace (ITV1),weblink The Daily Telegraph, 14 March 2018,weblink 14 March 2018, live, WEB,weblinkweblink" title="">weblink 25 March 2011, Into the Universe with Stephen Hawking, Discovery Channel, 25 April 2010, NEWS, Moulds, Josephine, 17 October 2011, Brave New World with Stephen Hawking, episode one, Channel 4, review,weblink The Daily Telegraph, 14 March 2018,weblink 14 March 2018, live, WEB,weblink Stephen Hawking's Grand Design, Discovery Channel UK, 25 October 2012,weblink" title="">weblink 27 April 2013, live, NEWS, Wollaston, Sam, 9 December 2013, Stephen Hawking: A Brief History of Mine – TV review,weblink The Guardian, 14 March 2018,weblink 14 March 2018, live, NEWS,weblink Eddie Redmayne plays Stephen Hawking in 'Theory of Everything' trailer, Jeff, Labrecque, Entertainment Weekly, 6 August 2014, 6 August 2014,weblink" title="">weblink 9 August 2015, live, }}


  • BOOK, Hawking, Stephen, My Brief History,weblink 2013, Bantam, 978-0-345-53528-3, 9 September 2013,
  • BOOK, Baird, Eric, Relativity in Curved Spacetime: Life Without Special Relativity,weblink 2007, Chocolate Tree Books, 978-0-9557068-0-6, harv,
  • BOOK, Boslough, John, 1989, Stephen Hawking's universe: an introduction to the most remarkable scientist of our time, Avon Books, 978-0-380-70763-8,weblink 4 March 2012,
  • BOOK, Ferguson, Kitty, Stephen Hawking: His Life and Work,weblink 2011, Transworld, 978-1-4481-1047-6, harv,
  • BOOK, Gibbons, Gary W., Gary Gibbons, Stephen W., Hawking, Siklos, S.T.C., The Very early universe: proceedings of the Nuffield workshop, Cambridge, 21 June to 9 July, 1982, Cambridge University Press, 1983, 978-0-521-31677-4,
  • BOOK, Jane, Hawking, Travelling to Infinity: My Life With Stephen,weblink 2007, Alma, 978-1-84688-115-2, harv,
  • BOOK, Hawking, Stephen W., Black holes and baby universes and other essays,weblink 1994, Bantam Books, 978-0-553-37411-7,
  • BOOK, Hawking, Stephen W., Ellis, George F.R., The Large Scale Structure of Space-Time,weblink 1973, Cambridge University Press, 978-0-521-09906-6,
  • BOOK, Hawking, Stephen W., Stephen Hawking's A brief history of time: a reader's companion,weblink 1992, Bantam Books, 978-0-553-07772-8, harv,,
  • BOOK, Hawking, Stephen W., Israel, Werner, Three Hundred Years of Gravitation,weblink 1989, Cambridge University Press, 978-0-521-37976-2,
  • BOOK, Larsen, Kristine, Stephen Hawking: a biography,weblink 2005, 978-0-313-32392-8, harv,
  • BOOK, Hélène, Mialet, Kevin C., Knox, Richard, Noakes, Is the end in sight for the Lucasian chair? Stephen Hawking as Millennium Professor, From Newton to Hawking: A History of Cambridge University's Lucasian Professors of Mathematics,weblink 2003, 425–460, Cambridge University Press, 978-0-521-66310-6, harv,
  • BOOK, Hélène, Mialet, Hawking Incorporated: Stephen Hawking and the Anthropology of the Knowing Subject,weblink 2012, University of Chicago Press, 978-0-226-52226-5,
  • BOOK, Okuda, Michael, Michael Okuda, Okuda, Denise, Denise Okuda, 1999, The Star Trek Encyclopedia: A Reference Guide to the Future, Pocket Books, 978-0-671-53609-1,weblink harv,
  • BOOK, Pickover, Clifford A., Clifford A. Pickover, 2008, Archimedes to Hawking: laws of science and the great minds behind them, Oxford University Press, 978-0-19-533611-5,weblink 4 March 2012,
  • BOOK, White, Michael, Gribbin, John, 2002, Stephen Hawking: A Life in Science,weblink 2nd, National Academies Press, 978-0-309-08410-9, harv,
  • BOOK, Yulsman, Tom, Origins: the quest for our cosmic roots,weblink 2003, CRC Press, 978-0-7503-0765-9, harv,

External links

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  • WEB,weblink Stephen Hawking at 70: Exclusive interview, New Scientist, 4 January 2012,
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  • These Are The Discoveries that made Stephen Hawking Famous, by Phillip Ball.
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