How old is the Earth? How fast can you think? How long is a light year and how short is a femtosecond? What does Greenwich Mean Time mean? Can you tell the time with flowers? When did time itself begin? This lighthearted, illustrated miscellany goes a long way to answering some of these questions and also presents a whole range of other amazing facts and figures that reveal the surprising influence of time on our daily lives. Time, we realize as we page through this book, affects us all in a wide range of unexpected ways. And it also generates some of the most intriguing questions asked by visitors to the Royal Observatory, the “Home of Time.” Building on those questions, the experts at the Royal Observatory present here a captivating primer on just what it is we mean, think about, and understand when we talk about time.