Plants have a variety of defenses - including onions.
What is the origin of a seven-day week?
First, what is an animal? Then, which one is the smallest?
There have been several different kinds of computers. Which was first?
Curious Kids: There's more to beach sand than meets the eye.
How can a U.S. presidential candidate lose if they receive more votes? The Electoral College plays a role.
If you're thinking about a smartphone, talk with your parents.
The color of paper money has several purposes.
Teachers have a variety of reasons for having students read stories from decades or even centuries ago.
Moths often flock to lights at night. What causes this behavior?