The human body makes a complete protein from plant sources only when complementary proteins are combined.

The human brain contains roughly 86 billion neurons.

Fact #8 · Human Body

Your brain uses 20% of your energy.

Fact #1709 · Human Body

Tyrannosaurus rex had teeth that could grow over 12 inches long.

Fact #619 · Human Body

The Thirty Years’ War affected much of Central Europe.

Fact #1171 · Human Body

A horned lizard can squirt blood from its eyes as a defense.

Fact #538 · Human Body

The brain consumes a significant portion of the body's energy.

Fact #967 · Human Body

Certain reptiles regulate body temperature through basking.

Fact #527 · Human Body

Some fish can learn by observing other fish.

Fact #1315 · Human Body