Richard P. Feynman (1918–1988) was professor of physics at the California Institute of Technology. A. Zee is professor of physics at the Kavli Institute for Theoretical Physics at the University of California, Santa Barbara. His many books include Fly by Night Physics, On Gravity, Group Theory in a Nutshell for Physicists, Einstein Gravity in a Nutshell, Quantum Field Theory in a Nutshell, and Fearful Symmetry (all Princeton). Feynman's bestselling...

Presents essays based on lectures given by mathematics professors Stephen Hawking and Roger Penrose in which they debate the foundations of quantum mechanics, discussing in mathematical and physical terms how to combine quantum theory with the theory of general relativity.

"One of New York Times Notable Books for 1997" Walter Alvarez is professor of geology at the University of California, Berkeley. Sixty-five million years ago, a comet or asteroid larger than Mount Everest slammed into the Earth, inducing an explosion equivalent to the detonation of a hundred million hydrogen bombs. Vaporized detritus blasted through the atmosphere upon impact, falling back to Earth around the globe. Disastrous environmental consequences...