Caution
Some customers have reported their shopping carts disappearing while they are not logged in. We are working to resolve this, but, for now, if you have more than 10 items, we recommend that you log in to be sure to preserve your cart. It's quick and easy!

or

About Time

A First Look at Time and Clocks

Share
The earliest people divided time into two intervals, nighttime and daytime. Today’s atomic clocks divide time into picoseconds—trillionths of a second! How did we get from there to here?

This detailed examination of the art of telling time spans cultures, technologies, and, of course, centuries. Children will discover which Egyptian god governs time measurement and what it is inside a mechanical clock that makes it go “tick-tock.”

Learn how the 12th century “verge and foliot” came to be replaced by the 17th century pendulum, and eventually by 20th century quartz crystals and microcircuits!

Thorough, in-depth explanations of clock technologies are presented in their historical context and paired with illustrative diagrams. Paperback, 32 pages. Ages 8 and up.
Item No. Product Name Price Qty
EM30 About Time - A First Look at Clocks - paperback
$6.95
In Stock

About Time

  • zoom