Time, always there, is a major element in the lives of most people in the civilized world. We’ve gotten used to it, we accept it, we adapt to it on leap years and such, and we go about our daily business without giving it much thought. Some people, however, do think about time, and they have asked quite a few questions about it, some of which have been satisfactorily answered, some of which haven’t. For example: When did people start keeping track of time and why? By what means have people measured time? When did time begin? What exactly is spacetime? What role does the human mind play in time? Is time travel possible? Perhaps the most important question of all is, “What exactly is time?” These and other questions about time are addressed in this book.
