The U.S. once detonated nuclear weapons underwater near its own ships for testing.

Deep-sea environments have crushing pressures far greater than at sea level.

Fact #1394 · Ocean

The Earth's poles experience extreme seasonal variations in sunlight.

Fact #207 · Ocean

Plankton form the base of many marine food chains.

Fact #663 · Ocean

A sea lion can dive hundreds of feet underwater.

Fact #482 · Ocean

The Arctic fox changes fur color with the seasons.

Fact #373 · Ocean

Some marine animals use bioluminescence to produce light.

Fact #208 · Ocean

A newborn blue whale gains about 200 pounds per day in its first year.

Fact #3662 · Ocean

The sailfish is among the fastest fish in the ocean.

Fact #397 · Ocean