Dolphins sleep with one eye open by resting half their brain at a time, a process called unihemispheric sleep.

Roughly half of all humans who have ever lived died from infectious diseases.

Fact #2766 · Ocean

A giant squid lives in deep ocean waters.

Fact #522 · Ocean

The Arctic fox changes fur color with the seasons.

Fact #373 · Ocean

The siphonophore can grow to extraordinary lengths in the ocean depths.

Fact #1408 · Ocean

Dolphins use teamwork.

Fact #2576 · Ocean

Some butterflies migrate seasonally.

Fact #505 · Ocean

The Earth's crust is thinner beneath oceans.

Fact #127 · Ocean

A googol is the number 1 followed by 100 zeros — the search engine Google is named after it, misspelled.

Fact #3598 · Ocean