The International Space Station goes around Earth about 16 times every day.

The strongest muscle for its size in your body is the one you chew with — the jaw muscle.

Scientists think some trees may share food and signals through their roots and tiny fungi underground.

Snowflakes almost always have six sides or six points.

Antarctica is the largest desert in the world — deserts are places with very little rain or snow.

Birds are living relatives of dinosaurs.

Ketchup was once sold as a medicine.