The blue whale's heartbeat can be detected from two miles away.

There are more possible shuffles of a deck of cards than seconds since Earth formed.

Fact #1675 · Human Body

The invention of the hypodermic syringe enabled effective drug delivery.

Fact #1206 · Human Body

Cats have a reflective layer in their eyes that improves night vision.

Fact #1367 · Human Body

Some snakes shed their skin multiple times a year.

Fact #485 · Human Body

The Thirty Years’ War affected much of Central Europe.

Fact #1171 · Human Body

The human body produces heat through metabolism.

Fact #116 · Human Body

The human eye can process images in milliseconds.

Fact #168 · Human Body

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

Fact #1189 · Human Body