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What happens in just a second?

A bat makes 200 high-pitched calls.

A hummingbird beats its wings 50 times.

A woodpecker hammers a tree trunk with its beak 20 times.

A human can blink 7 times.

A vulture in fight flaps its wings once.

This nonfiction picture... Read Full Overview

What can happen in just a second,
a minute, or an hour?How can we measure time?
The flap of a vulture's wing.
A crocodile's heartbeat.
The weight of a baby blue whale.
The life of a mayfly.
These increments of time may sound a bit strange, but they are all... Read Full Overview