Humans can detect the smell of rain, called petrichor, at concentrations as low as 5 parts per trillion.

The first artificial heart was implanted in the 1980s.

Fact #1209 · Human Body

In 2001, a Norwegian man survived a fall through ice by floating in near-freezing water.

Fact #800 · Human Body

Curiosity can enhance learning and memory retention.

Fact #973 · Human Body

The Moon was formed billions of years ago.

Fact #313 · Human Body

Water covers more than 70% of Earth's surface.

Fact #149 · Human Body

The human body replaces many of its cells regularly.

Fact #182 · Human Body

The human skin is the body's largest organ.

Fact #247 · Human Body

Some sharks can sense a drop of blood from far away.

Fact #348 · Human Body