There is enough gold inside Earth to coat the entire planet’s surface.

Tardigrades can survive extreme radiation, freezing, and even space.

Sharks existed before trees.

Water is the only common substance on Earth that naturally exists in all three states — solid, liquid, and gas — at everyday temperatures.

Prehistoric reptiles dominated land ecosystems.

The Arctic tern migrates farther than any other bird.

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

Lightning can strike the same place more than once.

There are organisms on Earth that can survive being frozen for years and still come back to life.