Mars has seasons because its axis is tilted 25° — similar to Earth's 23.5° tilt.

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

Fact #1408 · Ocean

The Earth's tilt causes seasonal changes.

Fact #144 · Ocean

There are more atoms in a glass of water than glasses of water in all Earth's oceans.

Fact #2341 · Ocean

Prehistoric coral reefs were similar to modern reefs.

Fact #707 · Ocean

The Ring of Fire surrounds much of the Pacific Ocean.

Fact #814 · Ocean

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

Fact #3404 · Ocean

The Pacific Ocean is larger than all of Earth's continents combined.

Fact #4 · Ocean

Some whales sing songs that travel hundreds of miles underwater.

Fact #381 · Ocean