In The Book of Time we see how philosophers, religions and scientists have tried to explain time as everything from a perfect cycle to ever-increasing chaos. We see how time works in the natural world and in our own bodies and minds, and how we've tried to measure it - first with calendars, then with increasingly sophisticated devices, from the Ancient Indian ghati and to the latest atomic clock.And from Aristotle to Einstein, we explore how time has been essential for scientists in their quest to understand the universe and everything in it. Not forgetting the deliciously weird world of time travel, explaining what is fact and what is fiction. This is the kind of book that you can dip into or read in depth - but either way we promise time will just fly by...