A polar bear's fur is actually transparent.

The Earth's mantle is composed of semi-solid rock.

Fact #329 · Human Body

Multitasking often reduces overall task performance.

Fact #950 · Human Body

The barreleye fish has a transparent head and upward-facing eyes.

Fact #1390 · Human Body

Sea turtles have existed for over 100 million years.

Fact #1286 · Human Body

The Earth's mantle lies between the crust and core.

Fact #301 · Human Body

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

Fact #1189 · Human Body

The axolotl can regenerate limbs and spinal tissue.

Fact #893 · Human Body

Cats can rotate their ears independently.

Fact #1336 · Human Body