Some cats are allergic to humans.

A snail can sleep for up to 3 years.

Sea otters hold hands when they sleep so they don’t drift apart.

The word “robot” comes from a Czech word meaning “forced labor.”

Tomatoes have more genes than humans.

The moon has moonquakes — like earthquakes, but on the Moon.

Sharks existed before trees — by about 200 million years.

Butterflies can taste with their feet.

The inventor of the frisbee was turned into a frisbee after he died — his ashes were molded into one.

The human nose can detect over 1 trillion different smells.