The first teddy bears were made in the early 1900s.

If you could drive a car to the Sun at highway speed, the trip would take more than 100 years.

Photosynthesis is how plants turn sunlight, water and air into food.

Only about 3% of Earth's water is fresh water; most of it is frozen in ice.

The Caesar cipher, a secret code, is named after Julius Caesar, who used it over 2,000 years ago.

A single little brown bat can catch hundreds of insects in one hour.

Some snails can stay sealed up and resting for months when the weather is very dry.