American - Physicist | February 9, 1963 -
The real reason why general relativity is widely accepted is because it made predictions that were borne out by experimental observations.
Brian Greene
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The full name of string theory is really superstring theory. The 'super' stands for this feature called supersymmetry, which, without getting into any details, predicts that for every known particle in the world, there should be a partner particle, the so-called supersymmetric partner.
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The funny thing is, I sometimes get the impression that some people outside of the field think that there's some element of security that we have in working on a theory that hasn't made any predictions that can be proven false. In a sense, we're working on something unfalsifiable.
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All mathematics is is a language that is well tuned, finely honed, to describe patterns; be it patterns in a star, which has five points that are regularly arranged, be it patterns in numbers like 2, 4, 6, 8, 10 that follow very regular progression.
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What makes a Beethoven symphony spectacular, what makes a Brahms rhapsody spectacular is that the patterns are wondrous.
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Science is a self-correcting discipline that can, in subsequent generations, show that previous ideas were not correct.
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My view is that science only has something to say about a very particular notion of God, which goes by the name of 'god of the gaps'.
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I think the appropriate response for a physicist is: 'I do not find the concept of God very interesting, because I cannot test it.'
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As scientists, we track down all promising leads, and there's reason to suspect that our universe may be one of many - a single bubble in a huge bubble bath of other universes.
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String theory is not the only theory that can accommodate extra dimensions, but it certainly is the one that really demands and requires it.
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I do feel strongly that string theory is our best hope for making progress at unifying gravity and quantum mechanics.
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Very much, string theory is simply a work in progress. What we are inching toward every day are predictions that within the realm of current technology we hope to test. It's not like we're working on a theory that is permanently beyond experiment. That would be philosophy.
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