The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
There are two golf balls sitting on the moon.
721
On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
7
The center of the galaxy tastes like raspberries and smells like rum, according to astronomers.
4
An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9