Humans have only been farming for about 10,000 years — for 99% of human history, we were hunter-gatherers.

The Trail of Tears forced Native American tribes westward in the 1830s.

Fact #1129 · Human Body

Learning involves changes in neural connections.

Fact #986 · Human Body

The primacy effect describes better recall of early information in a sequence.

Fact #1477 · Human Body

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

Fact #1367 · Human Body

Octopuses have three hearts and blue blood.

Fact #1674 · Human Body

The human brain operates on about 20 watts of power.

Fact #1744 · Human Body

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

Fact #1675 · Human Body

A gecko can climb vertical surfaces using microscopic hairs on its feet.

Fact #415 · Human Body