Welcome to KitabKhana

The Nature of Space and Time

Einstein said that the most incomprehensible thing about the universe is that it is comprehensible, but how correct was he? Can the quantum theory of fields and Einstein's general theory of relativity be united into a single quantum theory of gravity? Can quantum and cosmos ever be combined? Join two of the world's most famous physicists, Stephen Hawking and Roger Penrose, in debating these questions.

The authors describe how their positions have lead to further issues, including the spatial geometry of the universe, inflationary versus cyclic theories of the cosmos, and the black-hole information-loss paradox. In spite of many advancements being made, these physicists state that there is still a long way to go in the search for a quamtum theory of gravity.