Migratory birds have magnetic particles in their beaks — and cryptochrome proteins in their eyes — for navigation.

Operation Mongoose aimed to destabilize Cuba in the early 1960s.

Fact #1069 · Human Body

The use of defibrillators can restore normal heart rhythm.

Fact #1227 · Human Body

The wheel is one of the earliest human inventions.

Fact #1552 · Human Body

The human stomach can expand significantly after a large meal.

Fact #101 · Human Body

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

Fact #800 · Human Body

The Earth is about 4.5 billion years old.

Fact #172 · Human Body

The fangtooth fish has some of the largest teeth relative to body size in the ocean.

Fact #1392 · Human Body

Practice can strengthen neural pathways in the brain.

Fact #968 · Human Body