Fact 1: The Earth's atmosphere is made up of 78% nitrogen, 21% oxygen, and 1% other gases.
Fact 2: The highest point on Earth is Mount Everest, which reaches 8,848 meters (29,029 feet) above sea level.
Fact 3: Earth is the only planet in our solar system known to have life.
Fact 4: About 70% of Earth's surface is covered by oceans, which hold 97% of the planet's water.
Fact 5: Earth's magnetic field is created by the movement of molten iron in the outer core.
Fact 6: The Earth is roughly 4.54 billion years old.
Fact 7: Earth's rotation is gradually slowing down, at a rate of about 17 milliseconds per hundred years.
Fact 8: The longest river in the world is the Nile, stretching 6,650 kilometers (4,130 miles), although some sources claim the Amazon River is longer.
