From the earliest recorded date (4236 B.C.), people have tried to organize their lives according to the movements of the sun, moon and stars - and have, for the most part, consistently gotten it wrong. In this volume, David Ewing Duncan takes us on an extraordinary journey through man's reckoning of time, ranging from one of the earliest calendars (a series of markings gouged into an eagle bone 13,000 years ago) to the atomic clocks of today, which measure time too well for an ever slowing Earth.