Fingernails grow about four times faster than toenails.

The eruption of Krakatoa in 1883 was heard thousands of miles away.

Fact #820 · Human Body

The Earth spins at 1000 mph.

Fact #1704 · Human Body

Humans reached the Moon less than 70 years after powered flight.

Fact #1741 · Human Body

The fangtooth fish has some of the largest teeth relative to body size in the ocean.

Fact #1392 · Human Body

Some birds have hollow bones to reduce body weight for flight.

Fact #889 · Human Body

Some insects can lift many times their body weight.

Fact #213 · Human Body

Hippopotamuses secrete a reddish fluid that helps protect their skin.

Fact #1246 · Human Body

The Dead Sea is one of the saltiest bodies of water on Earth.

Fact #266 · Human Body