More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
Earth is the only planet in our solar system that's not named after a god or goddess.
17
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
According to a 2011 poll, 32% of Russians believe that the Sun orbits Earth.
11
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
The United States has paved enough roads to circle the Earth over 150 times.
72