The Earth's tilt causes seasonal changes.

The Erie Canal connected the Great Lakes to the Atlantic Ocean.

Fact #1131 · Ocean

Sea cucumbers can expel internal organs as a defense mechanism.

Fact #350 · Ocean

Only about 5% of the ocean has been explored by humans.

Fact #2776 · Ocean

Public health sanitation reforms reduced disease outbreaks.

Fact #1210 · Ocean

Sea otters hold hands while sleeping so they don't drift apart.

Fact #3229 · Ocean

A blue-ringed octopus carries venom potent enough to affect humans.

Fact #370 · Ocean

Octopuses can escape sealed containers and solve puzzles.

Fact #2561 · Ocean

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

Fact #1407 · Ocean