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
The United States has paved enough roads to circle the Earth over 150 times.
72
Earth is the only planet in our solar system that's not named after a god or goddess.
17
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
According to a 2011 poll, 32% of Russians believe that the Sun orbits Earth.
11
The earth is approx. 6,588,000,000,000,000,000 tons.
175
There are approximately three chickens for every human on Earth.
13