A cat's brain is about 90% similar to a human brain in structure.

Smiling can influence mood through feedback to the brain.

Fact #951 · Human Body

The human eye can detect a single photon.

Fact #1706 · Human Body

Cats can rotate their ears independently.

Fact #1336 · Human Body

Pandas have a specialized wrist bone that functions like a thumb.

Fact #1237 · Human Body

Some insects have compound eyes made of many lenses.

Fact #513 · Human Body

The human heart has four chambers.

Fact #306 · Human Body

Your brain uses patterns to recognize faces almost instantly.

Fact #1752 · Human Body

Your brain uses 20% of your energy.

Fact #1709 · Human Body