Stephen Hawking: Trending quotes (page 3)

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Stephen Hawking: 244   quotes 258   likes

“I'm sorry to disappoint science fiction fans, but if information is preserved, there is no possibility of using black holes to travel to other universes. If you jump into a black hole, your mass energy will be returned to our universe but in a mangled form which contains the information about what you were like but in a state where it can not be easily recognized. It is like burning an encyclopedia. Information is not lost, if one keeps the smoke and the ashes. But it is difficult to read. In practice, it would be too difficult to re-build a macroscopic object like an encyclopedia that fell inside a black hole from information in the radiation, but the information preserving result is important for microscopic processes involving virtual black holes.”

Stephen Hawking

"Information Loss in Black Holes" http://arxiv.org/abs/hep-th/0507171 (July 2005)

Disappointment , Travel , Universe , Science

“The Dreams that Stuff is Made of”

Stephen Hawking

Title of a collection, by Hawking, of the most significant papers in Quantum mechanics: The Dreams That Stuff Is Made of : The Most Astounding Papers of Quantum Physics and How They Shook the Scientific World (2011)

Dreams

“I regard [the many worlds interpretation] as self-evidently correct. [T. F.: Yet some don't find it evident to themselves. ] Yeah, well, there are some people who spend an awful lot of time talking about the interpretation of quantum mechanics. My attitude — I would paraphrase Goering—is that when I hear of Schrödinger's cat, I reach for my gun.”

Stephen Hawking

Heard in person by this contributor when Hawking showed-up in a Caltech physics class taught by Robert Christy in 1980 or '81; when asked about collapse of the state-vector he whispered to his assistant Chris (surname unknown) something at which point Chris stood up and said 'Stephen is paraphrasing Herman Göring by saying "When I hear the words 'Schrödinger's Cat' I reach for my gun."'.
Source: In a conversation with Timothy Ferris (4 April 1983), as quoted in The Whole Shebang (1998) by Timothy Ferris, p. 345 http://books.google.com/books?id=qjYbQ7EBAKwC&lpg=PA345&ots=F6VWymjiPx&dq=%22reach%20for%20my%20revolver%22%20hawking%20-%22oft-made%22&pg=PA345#v=onepage&q=%22reach%20for%20my%20revolver%22%20hawking%20-%22oft-made%22&f=false

World , People , Time , Cats

“I used to think that information was destroyed in black holes. But the AdS/CFT correspondence led me to change my mind. This was my biggest blunder, or at least my biggest blunder in science.”

Stephen Hawking

"Stephen Hawking at 70: Exclusive interview" http://www.newscientist.com/article/mg21328460.500-stephen-hawking-at-70-exclusive-interview.html in New Scientist, (4 January 2012). In his comment that he "used to think that information was destroyed in black holes", he is referring to the black hole information paradox.

Thinking , Science , Change

“Evolution has ensured that our brains just aren't equipped to visualise 11 dimensions directly. However, from a purely mathematical point of view it's just as easy to think in 11 dimensions, as it is to think in three or four.”

Stephen Hawking

As quoted in "Return of the time lord" in The Guardian http://books.guardian.co.uk/departments/scienceandnature/story/0,6000,1579384,00.html (27 September 2005)

Mathematics , Thinking

“The subject of this book is the structure of space-time on length-scales from 10-13cm, the radius of an elementary particle, up to 1028cm, the radius of the universe. …we base our treatment on Einstein's General Theory of Relativity. This theory leads to two remarkable predictions about the universe: first, that the final fate of massive stars is to collapse behind an event horizon to form a 'black hole' which will contain a singularity; and secondly, that there is a singularity in our past which constitutes, in some sense, a beginning to the universe.”

Stephen Hawking book The Large Scale Structure of Space-Time

with G.F.R. Ellis, "The Large Scale Structure of Space-Time" (1973) Preface

Fate , Books , Star , Sense

“Because there is a law such as gravity, the universe can and will create itself from nothing. Spontaneous creation is the reason there is something rather than nothing, why the universe exists, why we exist. It is not necessary to invoke God to light the blue touch paper and set the universe going.”

Stephen Hawking book The Grand Design

The Grand Design (2010)

God , Law , Light , Universe

“What I have done is to show that it is possible for the way the universe began to be determined by the laws of science. In that case, it would not be necessary to appeal to God to decide how the universe began. This doesn't prove that there is no God, only that God is not necessary.”

Stephen Hawking

Der Spiegel (17 October 1988)

God , Law , Way , Universe

“Science predicts that many different kinds of universe will be spontaneously created out of nothing. It is a matter of chance which we are in.”

Stephen Hawking

Interview with The Guardian (15 May 2011)

Universe , Science , Chance

“Science could predict that the universe must have had a beginning.”

Stephen Hawking book Black Holes and Baby Universes and Other Essays

Black Holes and Baby Universes and Other Essays (1993)

Universe , Science

“Galileo, perhaps more than any other single person, was responsible for the birth of modern science.”

Stephen Hawking book A Brief History of Time

Source: A Brief History of Time (1988), p. 179

Birth , Science , Personality

“I have hardly ever known a mathematician who was able to reason.”

Stephen Hawking

Plato, The Republic, Book VII, 531-E
Misattributed

“I am discounting reports of UFOs. Why would they appear only to cranks and weirdos?”

Stephen Hawking

As quoted in a TED talk, " Asking Big Questions about the Universe http://www.ted.com/talks/view/id/242"

Appearance

“Someone told me that each equation I included in the book would halve the sales. I therefore resolved not to have any equations at all. In the end, however, I did put in one equation, Einstein's famous equation, E = mc^2. I hope that this will not scare off half of my potential readers.”

Stephen Hawking book A Brief History of Time

A Brief History of Time (1988)

Books , Hope

“The greatest enemy of knowledge is not ignorance. It is the illusion of knowledge.”

Stephen Hawking

Sometimes attributed to Hawking without a source, but originally from historian Daniel J. Boorstin. It appears in different forms in The Discoverers (1983), Cleopatra's Nose (1995), and introduction to The Decline and Fall of the Roman Empire (1995)
Misattributed

Knowledge

“We shouldn't be surprised that conditions in the universe are suitable for life, but this is not evidence that the universe was designed to allow for life. We could call order by the name of God, but it would be an impersonal God. There's not much personal about the laws of physics.”

Stephen Hawking

Quoted in "Leaping the Abyss" (April 2002) by Gregory Benford, in Reason Magazine http://reason.com/archives/2002/04/01/leaping-the-abyss/4

Life , God , Law , Universe

“To show this diagram properly, I would really need a four dimensional screen. However, because of government cuts, we could manage to provide only a two dimensional screen.”

Stephen Hawking

The Beginning of Time (1996)

“Einstein is the only figure in the physical sciences with a stature that can be compared with Newton. Newton is reported to have said "If I have seen further than other men, it is because I stood on the shoulders of giants." This remark is even more true of Einstein who stood on the shoulders of Newton. Both Newton and Einstein put forward a theory of mechanics and a theory of gravity but Einstein was able to base General Relativity on the mathematical theory of curved spaces that had been constructed by Riemann while Newton had to develop his own mathematical machinery. It is therefore appropriate to acclaim Newton as the greatest figure in mathematical physics and the Principia is his greatest achievement.”

Stephen Hawking

"Newton's Principia" in 300 Years of Gravitation. (1987) by S. W. Hawking and W. Israel, p. 4

Men , Mathematics , Science

“The universe would have expanded in a smooth way from a single point. As it expanded, it would have borrowed energy from the gravitational field, to create matter. As any economist could have predicted, the result of all that borrowing, was inflation. The universe expanded and borrowed at an ever-increasing rate. Fortunately, the debt of gravitational energy will not have to be repaid until the end of the universe.”

Stephen Hawking

The Beginning of Time (1996)

Way , Universe

“The human race is just a chemical scum on a moderate-sized planet, orbiting around a very average star in the outer suburb of one among a hundred billion galaxies. We are so insignificant that I can't believe the whole universe exists for our benefit. That would be like saying that you would disappear if I closed my eyes.”

Stephen Hawking

Interview with Ken Campbell on Reality on the Rocks: Beyond Our Ken (1995) http://www.youtube.com/watch?v=S3aadgf0GH8

Star , Universe