Each chapter is largely self-contained, is intelligent and accesible, and manages not to patronise - a flaw of so much of the popular science genre. The scientist biographies are there of course, as are the obligatory Feynman diagrams, but what sets this apart from similar books are the chapters on perception. "What time is now" is superbly thought-provoking, as it explores how our minds perceive each moment of time... novel and just a little frightening
His explanations of Einstein's Special and General Theories of Relativity are concise and explained rigorously using conceivable scenarios. I enjoyed this very much and hope that others will enjoy this book as much as I did.
Davies has subtitled his book "Einstein's unfinished revolution," and he does an excellent job of exposing the reader to some of the unexpected (from a common-sense point of view) conclusions we draw about time from the special and general theories of relativity. He offers an interesting historical perspective on the life of Einstein, and how he developed his theories. Davies also provides some interesting background on experiments that have validated Einstein's space-time, reviewing the qualitative results from some of the more important experiments.
After this introduction to the non-universal time of relativity, Davies takes us to the ultimate time machine: black holes. He offers some interesting explanations about what an imaginary traveler to a black hole might see looking out, and how we - looking in - might view the hapless victim as she neared the event horizon.
As the book progresses, conclusions and examples become less and less concrete. Relative time is a proven fact, and most physicists consider black holes a foregone conclusion. From there, Davies takes us to the very root of some of the biggest issues in cosmology: the origin of time and the age of the universe.Read more ›