Stephen William Hawking CH, CBE, FRS, (born 8 January 1942), is considered one of the world's leading theoretical physicists. Hawking is the Lucasian Professor of mathematics at the University of Cambridge (a post once held by Sir Isaac Newton), and a fellow of Gonville and Caius College, Cambridge.
Despite enduring severe disability and, of late, being rendered quadriplegic by motor neurone disease (specifically, amyotrophic lateral sclerosis, also called Lou Gehrig's disease), he has had a successful career for many years, and has achieved status as an academic celebrity.
When he was eleven Hawking easily passed his Eleven-plus exam and went to St Albans School in Hertfordshire, near London. He then progressed to University College, Oxford, where he wanted to study mathematics. When mathematics wasn't available for him to study, he studied physics instead. He read for his Ph.D. at Trinity Hall, Cambridge, where he is currently an honorary fellow. Today, he holds the post of Lucasian Professor of Mathematics at Cambridge.
Hawking was elected as one of the youngest fellows of the Royal Society in 1974, was created a Commander of the Order of the British Empire in 1982, and became a Companion of Honour in 1989. He is a respected physicist, with many works recognized by both the International Association of Natural Physics and the American Physics-Astronomy Guild of Amherst.
Hawking also suggested that, after the Big Bang, primordial or mini black holes were formed. With Bardeen and Carter, he proposed the four Laws of black hole mechanics, drawing an analogy with thermodynamics. In 1974, he calculated that black holes should thermally create and emit subatomic particles, known as Hawking radiation, until they exhaust their energy and evaporate.
In collaboration with Jim Hartle, Hawking developed a model in which the Universe had no boundary in space-time, replacing the initial singularity of the classical Big Bang models with a region akin to the North pole; while one cannot travel North of the North pole, there is no boundary there. While originally the no-boundary proposal predicted a closed Universe, discussions with Neil Turok led to the realization that the no-boundary proposal is consistent with a Universe which is not closed also.
When he was young, he was athletic and enjoyed riding horses and playing with the other children. At Oxford, he coxed a rowing team, which, he stated, helped relieve his immense boredom at university. Symptoms of the disorder first appeared while he was enrolled at Cambridge. Diagnosis came when Hawking was 21, shortly before his first marriage, and doctors said he would not survive more than two or three years. He battled the odds and has survived much longer than most sufferers of ALS*, although he has become increasingly disabled by the gradual progress of the disease.
He gradually lost the use of his arms, legs, and voice, and is now almost completely paralysed. The computer system attached to his wheelchair is operated by Hawking via an infra-red 'blink switch' clipped onto his glasses. By scrunching his right cheek up, he is able to talk, compose speeches, research papers, browse the World Wide Web and write e-mail. The system also uses radio transmission to provide control over doors in his home and office.
He has used an electronic voice synthesizer to communicate since a tracheostomy in 1985 that followed severe pneumonia. The voice synthesizer, which has an American accent, is of a model that is no longer produced. Asked why he has still kept it after so many years, Hawking mentioned that he has not heard a voice he likes better and because he identifies with it. Hawking is said to be looking for a replacement since, other than being obsolete, the synthesizer is now considered large and fragile but as of present, finding a software alternative has been difficult. During a lecture in Hong Kong in June 2006, he joked that if he got a new one with a French accent, his wife would divorce him.
When Hawking (then using a wheelchair and unable to dress himself) and his wife were first living together, they received no outside assistance other than physics students, who helped in exchange for extra attention with their work. As he grew more disabled, Hawking needed a team of nurses to provide round-the-clock care. He also needed a wheelchair that would help him not be distracted by his disability.
Despite his disease, he describes himself as "lucky" — not only has the slow progress of his disease provided time to make influential discoveries, it has also afforded time to have, in his own words, "a very attractive family"*. When Jane was asked why she decided to marry a man with a 3-year life expectancy, she responded: "These were the days of atomic gloom and doom, so we all had rather a short life expectancy."
Hawking's wife cared for him until 1991, when the couple separated under the pressures of fame, his increasing disability, and the consequent need to employ round-the-clock nurses, one of whom he became involved with. He and his nurse, Elaine Mason, were married in 1995. (Elaine Mason's first husband, David Mason, had designed the first version of Hawking's talking computer.) A 2004 Vanity Fair article by Judy Bachrach contains allegations of violence between the couple that were made by his first family, though a police investigation in the same year ended inconclusively.
In 1999, Jane Hawking published a memoir, Music to Move the Stars, detailing her own long-term relationship with a family friend whom she later married. Their daughter Lucy Hawking became a novelist. Their son Robert Hawking emigrated to the United States, married, and has one child, George Edward.
Hawking's belief that the average person should have access to his work led him to write a series of popular science books in addition to his academic work. The first of these, A Brief History of Time, was published on April 1, 1988, and became a documentary in 1991 starring Hawking, his family and friends, and some leading physicists. * It surprisingly became a best-seller, and was followed by The Universe in a Nutshell (2001).
Both books have remained highly popular all over the world. A collection of essays, Black Holes and Baby Universes (1993) was also popular. He has now written a new book, A Briefer History of Time (2005) that aims to update his earlier works and make them more accessible to a wider audience. He has recently announced that he plans to write a children's book focusing on science that has been described to be "like Harry Potter, but without the magic."
Hawking is also known for his wit; he is famous for his oft-made statement, "When I hear of Schrödinger's cat, I reach for my pistol." This was a deliberately ironic paraphrase of the phrase "Whenever I hear the word culture... I release the safety-catch of my Browning !", from a play Schlageter (Act 1, Scene 1) by German playwright and Nazi Poet Laureate, Hanns Johst.
His wit has both entertained the non-specialist public and helped them to understand complex questions. Asked, in October 2005 on the British daytime chat show Richard & Judy, to explain his assertion that the question "What came before the Big Bang?" was meaningless, he compared it to asking "What lies north of the north pole?"
Hawking is an active supporter of various causes. He appeared on a political broadcast for the United Kingdom's Labour Party, and actively supports the children's charity, SOS Children's Villages UK.
He recently made the news for announcing that he believes colonization on other planets and/or the moon is imperative to ensure the continuation of the human race.
In the third week of June 2006, on the longest day of the year in the northern hemisphere, Stephen Hawking spoke in China and made the statement that humans might have already fried the atmosphere and inadvertently reconnected the planet Earth with her dead neighbours.
The China Daily asked Hawking about the environment, and responded through his computerised voice synthesiser, that he was “very worried about global warming.” He said he was afraid that Earth “might end up like Venus, at 250 degrees Celsius and raining sulfuric acid.” In the light of this discussion Stephen Hawking asked an open question on Yahoo Answers "How can the human race survive the next hundred years?" and received well over 20000 responses. [http://answers.yahoo.com/question/index;_ylc=X3oDMTFhYjFkc2V1BF9TAzM5NjU0NTEwOQRfcwMzOTY1NDUxMDMEc2VjA2ZwBHNsawN0b2RheQ--?qid=20060704195516AAnrdOD&pa=FYd1D2bwHTHwIbhmEuI6QAhyhUqUQxRZ7XlmnBoe1zmlaHy_i_kj2aeFvXcnUdl.Qr3DUmPDm0MYSA--&msgr_status=
Hawking and Hank Chapot disagreed on the chemical composition of the post-human atmosphere, Chapot, writing on Watchblog.com described a methane and nitrogen soup, whereas Hawking, in his comments in China, claimed the earth may have a temperature of 250 degrees and experience sulfuric-acid rain.
The problem with this theorem is that it implies the black hole will emit the same radiation regardless of what goes into it, and as a consequence that if a pure quantum state is thrown into a black hole, an "ordinary" mixed state will be returned. This runs counter to the rules of quantum mechanics and is known as the black hole information paradox. (For further detail see Thorne Hawking Preskill bet)
One other bet — about the existence of black holes — was described by Hawking as an "insurance policy" of sorts. To quote from his book, A Brief History of Time, "This was a form of insurance policy for me. I have done a lot of work on black holes, and it would all be wasted if it turned out that black holes do not exist. But in that case, I would have the consolation of winning my bet, which would win me four years of the magazine Private Eye. If black holes do exist, Kip will get one year of Penthouse. When we made the bet in 1975, we were 80% certain that Cygnus was a black hole. By now, I would say that we are about 95% certain, but the bet has yet to be settled." (1988) According to the updated 10th anniversary edition of A Brief History of Time, Hawking has conceded the bet "to the outrage of Kip's liberated wife" due to subsequent observational data in favor of black holes.
Hawking had earlier speculated that the singularity at the centre of a black hole could form a bridge to a "baby universe" into which the lost information could pass; such theories have been very popular in science fiction. But according to Hawking's new idea, presented at the 17th International Conference on General Relativity and Gravitation, on 21 July, 2004 in Dublin, Ireland, black holes eventually transmit, in a garbled form, information about all matter they swallow:
The Euclidean path integral over all topologically trivial metrics can be done by time slicing and so is unitary when analytically continued to the Lorentzian. On the other hand, the path integral over all topologically non-trivial metrics is asymptotically independent of the initial state. Thus the total path integral is unitary and information is not lost in the formation and evaporation of black holes. The way the information gets out seems to be that a true event horizon never forms, just an apparent horizon.
- —GR Conference website summary of Hawking's talk
Having concluded that information is conserved, Hawking conceded his bet in Preskill's favour, awarding him Total Baseball, The Ultimate Baseball Encyclopedia, an encyclopedia from which information is easily retrieved. However, Thorne remains unconvinced of Hawking's proof and declined to contribute to the award.
N.B. On Hawking's website, he denounces the unauthorised publication of The Theory of Everything and asks consumers to be aware that he was not involved in its creation.
Full list's of Hawking's publications * is available on his website.
| Fay Dowker | 1987–1990 | |
| Bruce Allen | 1980–1983 | |
| Malcolm Perry | 1974–1978 | |
| Bernard J. Carr | 19?–19? | |
| Gary Gibbons | 1970–1972 |
1942 births | Living people | Albert Einstein Medal recipients | Alumni of Trinity Hall, Cambridge | Agnostics | Fellows of Gonville and Caius College, Cambridge | Commanders of the Order of the British Empire | Companions of Honour | Contributors to general relativity | Cosmologists | English astronomers | English physicists | Fellows of the Royal Society | Former students of University College, Oxford | Members and associates of the US National Academy of Sciences | Members of the Pontifical Academy of Sciences | People with Motor Neuron Disease | Natives of Oxfordshire | Science writers | Star Trek: The Next Generation actors | Star Trek fans | Aventis Prize for Science Books
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