Physics & Astronomy

The Nature of Space and Time

    Afterword by
  • Stephen Hawking
  • Roger Penrose

From two of the world's great physicistsStephen Hawking and Nobel laureate Roger Penrosea lively debate about the nature of space and time


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Sep 22, 2015
5.5 x 8.5 in.
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Einstein said that the most incomprehensible thing about the universe is that it is comprehensible. But was he right? 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 into a single quantum theory of gravity? Can quantum and cosmos ever be combined? In The Nature of Space and Time, two of the world’s most famous physicists—Stephen Hawking (A Brief History of Time) and Roger Penrose (The Road to Reality)—debate these questions.

The authors outline how their positions have further diverged on a number of key issues, including the spatial geometry of the universe, inflationary versus cyclic theories of the cosmos, and the black-hole information-loss paradox. Though much progress has been made, Hawking and Penrose stress that physicists still have further to go in their quest for a quantum theory of gravity.

Roger Penrose is awarded the Nobel Prize in Physics, 2020

Awards and Recognition

  • Roger Penrose, Co-Winner of the Nobel Prize in Physics, Royal Swedish Academy of Sciences