Antibiotics reduced infection deaths so dramatically that the leading causes of death shifted to chronic disease.

Sea otters hold hands while sleeping so they don't drift apart.

Fact #3229 · Ocean

The Earth's crust is thinner beneath oceans.

Fact #127 · Ocean

Some volcanoes can erupt underwater.

Fact #2624 · Ocean

The compass improved navigation at sea.

Fact #1551 · Ocean

The Pacific Ocean contains thousands of islands.

Fact #200 · Ocean

Some coral reefs are visible from space.

Fact #197 · Ocean

Dolphins use signature whistles that function like names.

Fact #1313 · Ocean

The Great Barrier Reef is the largest coral reef system in the world.

Fact #13 · Ocean