This book tells how time measured, including the instruments and units used and why this information is important to us.

Explores the measurement of time, including days, weeks, months, and years, and introduces clocks and how to read them to determine seconds, minutes, and hours.

Explains concepts associated with time, including the origins of the terms midnight and afternoon, and describes various mechanisms used to tell time. Includes discussion prompts.

What if we could travel not just through space, but through time itself? If you could travel through time, would you change the past or the future? What if you found it couldn't be changed? What price does the time traveler - and the people they are closest to - pay? This is a journey from H. G. Wells' The Time Machine through ideas like The Grandfather Paradox and The Butterfly Effect to the professional time traveler that is the ever popular Doctor...

Text and photographs describe time and how it is measured.

This title explains what time is and the different kinds of ways, like seconds and hours, to measure it. It also gives everyday examples of things that have to do with time.

Features images of clocks showing the time accompanied by the English and Chinese spelling and pronunciation of each word.

An illustrated book of projects exploring the mysteries of time and how it is measured.