Over 90% of Earth's volcanic activity occurs underwater, along mid-ocean ridges.

The tallest mountain from base to peak is Mauna Kea in Hawaii — it's just mostly underwater.

Fact #3405 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #2150 · Ocean

Coral reefs are formed by tiny marine animals called polyps.

Fact #98 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #1796 · Ocean

The ocean contains structures larger than mountain ranges.

Fact #2212 · Ocean

Coral reefs are expected to decline by 70–90% if global temperatures rise 1.5°C above pre-industrial levels.

Fact #5233 · Ocean

Over 90% of Earth's volcanic activity occurs underwater, along mid-ocean ridges.

Fact #4774 · Ocean

A sea turtle can navigate back to its birthplace decades later.

Fact #575 · Ocean