Earth Facts
The Earth is estimated to be 4.5 billion years old. It travels through space at 660,000 miles per hour.
The oldest rocks in the world, the so-called St. Peter and St. Paul stones in the Atlantic Ocean, are 4 billion years old.
The Earth weighs 6,588,000,000,000,000,000,000,000 tons.
The earth rotates on its axis more slowly in March than in September.
If the Earth were compressed to a sphere with a 2-inch diameter, its surface would be as smooth as a billiard ball's.
The temperature of the Earth's interior increases by 1 degree every 60 feet down.
If the world were to become totally flat and the oceans distributed themselves evenly over the earth's surface, the water would be approximately 2 miles deep at every point.
Glaciers occupy 5.8 million square miles, or 10 percent of the world's land surface, an area as large as South America.
The world is not round. It is an oblate spheroid, flattened at the poles and bulging at the equator.
Planet Facts