Nearly half of adults worldwide have less than $10,000 in wealth.

The human heart has four chambers.

Fact #306 · Human Body

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

Fact #805 · Human Body

Ankylosaurus had a heavily armored body and a clubbed tail.

Fact #673 · Human Body

The Peloponnesian War lasted nearly three decades.

Fact #1442 · Human Body

Extreme droughts can last for years.

Fact #832 · Human Body

The Empire State Building was completed in just over a year.

Fact #1512 · Human Body

The Olympic Games are held every four years.

Fact #923 · Human Body

Some animals sleep for years.

Fact #1720 · Human Body