Humans share their birthday with millions of other people around the world.

Mount Everest is the tallest mountain above sea level.

Scientists learn about dinosaurs by studying fossils — bones and footprints turned to stone.

Bananas grow in bunches called "hands", and each banana is a "finger".

Your inner ear helps you hear and also helps you keep your balance.

A single cloud can weigh as much as a hundred elephants.

Octopuses can taste things with the suckers on their arms.