Astronauts grow a little taller in space because there is less gravity squishing their spines.

Your heart beats about 100,000 times every day.

The smallest bone in your body is in your ear. It is about the size of a grain of rice.

Sunflowers follow the Sun across the sky when they are young.

The Pacific Ocean is bigger than all the land on Earth put together.

The deepest part of the ocean is deeper than Mount Everest is tall.

Dinosaurs lived on every continent, including Antarctica.