Horseshoe crabs are living fossils — they've barely changed in 450 million years.

The Earth is slightly flattened at the poles.

Fact #131 · Human Body

The steam engine powered early industrial machinery.

Fact #1544 · Human Body

Some animals can regenerate entire body parts.

Fact #1775 · Human Body

Insulin was first used to treat diabetes in the early 1920s.

Fact #1189 · Human Body

In 1809, two countries declared war and then forgot to sign a peace treaty for years.

Fact #805 · Human Body

Extreme droughts can last for years.

Fact #832 · Human Body

The human eye can distinguish millions of colors.

Fact #74 · Human Body

Your brain creates reality.

Fact #1722 · Human Body