Earth's atmosphere contains traces of several noble gases, including argon, neon, helium, and krypton.

The Sahara Desert is the largest hot desert in the world.

The average temperature of Earth's surface is about 16°C (8°F).

The Earth's crust varies in thickness, ranging from about 5 kilometers (3 miles) under oceans to about 70 kilometers (43 miles) under continents.

Earth has a gravitational force that is 8 meters per second squared.

The Earth's core is made primarily of iron and nickel.

Earth has experienced five major ice ages.

Earth’s largest inland body of water is the Caspian Sea.

The Earth's atmosphere exerts a pressure of about 7 pounds per square inch at sea level.

The Great Barrier Reef is the largest coral reef system in the world.