The hard problem of consciousness — why physical brain processes produce subjective experience — remains unsolved.

The Dead Sea is one of the saltiest bodies of water on Earth.

Fact #266 · Human Body

Ankylosaurs had armored bodies and clubbed tails.

Fact #629 · Human Body

Some snakes shed their skin multiple times a year.

Fact #485 · Human Body

The stegosaurus had a brain about the size of a walnut.

Fact #627 · Human Body

The Earth's inner core is solid despite extreme heat.

Fact #217 · Human Body

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

Fact #348 · Human Body

The human brain contains about 86 billion neurons.

Fact #1676 · Human Body

The human eye can adapt to low-light conditions.

Fact #279 · Human Body