About this title: Can the quantum theory of fields and Einstein's general theory of relativity, the two most accurate and successful theories in all of physics, be united in a single quantum theory of gravity? On this issue, two of the world's most famous physicists disagree. Here, Stephen Hawking and Roger Penrose explain their positions in a work based on six lectures with a final debate, all originally presented at the Issac Newton Institute for Mathematical Sciences at the University of Cambridge. 75 line drawings.
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