An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
Earth is the only planet in our solar system that's not named after a god or goddess.
17
The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
The sun is 330,330 times larger than the earth!
190
The population of the Earth has more than doubled since 1950.
151
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
If two pieces of metal touch in space, they become permanently stuck together.
808
41% of the moon is not visible from earth at any time.
103