Heart disease is the leading cause of death globally.

Whales are mammals and must breathe air.

Fact #265 · Ocean

Some deep‑sea fish create their own light.

Fact #2475 · Ocean

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

Fact #1394 · Ocean

A hippopotamus can hold its breath underwater for several minutes.

Fact #433 · Ocean

Sea horses swim upright rather than horizontally.

Fact #446 · Ocean

The vampire squid can turn itself inside out as a defense mechanism.

Fact #1385 · Ocean

There is a river in the ocean — the Gulf Stream moves more water than all of Earth's rivers combined.

Fact #3404 · Ocean

Certain whales use bubble nets to trap fish.

Fact #515 · Ocean