The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Earth is the only planet in our solar system that's not named after a god or goddess.
17
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9
In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
175
Some asteroids have other asteroids orbiting them.
131
A car traveling 100 mph would take more than 29 million years to reach the nearest star (to our solar system)
88
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194