The global burden of mental illness is equivalent to a disease killing 8 million people per year.

Certain dolphins cooperate to herd fish in coordinated groups.

Fact #1301 · Ocean

Some deep-sea fish have expandable stomachs to consume rare prey.

Fact #1407 · Ocean

Octopuses have been observed using tools and solving puzzles.

Fact #2232 · Ocean

Certain marine animals use camouflage to blend into coral reefs.

Fact #487 · Ocean

Operation Ivy Bells involved Cold War submarine intelligence gathering.

Fact #1075 · Ocean

A jellyfish moves by pulsing its bell-shaped body.

Fact #506 · Ocean

Dolphins use echolocation to navigate and hunt underwater.

Fact #12 · Ocean

Dolphins use signature whistles that function like names.

Fact #1313 · Ocean