More people die from selfies than from shark attacks in some years.

The Earth's rotation speed varies slightly over time.

Fact #237 · Human Body

The first artificial heart was implanted in the 1980s.

Fact #1209 · Human Body

The Sumerians developed one of the earliest known writing systems.

Fact #644 · Human Body

Vaccines train the immune system to recognize pathogens.

Fact #64 · Human Body

The human eye can process images in milliseconds.

Fact #168 · Human Body

Cats can rotate their ears independently.

Fact #1336 · Human Body

Polar bears have a thick layer of fat to retain body heat.

Fact #867 · Human Body

Stem cell research explores regenerative medicine.

Fact #1218 · Human Body