All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
It 'snows' metal on Venus.
13
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
Mars had an oxygen-rich atmosphere around 4 billion years ago
13
If you were to cry in space, the tears would form a bubble in your eye until it's so big it moves to another spot on your face.
10
The population of the Earth has more than doubled since 1950.
151
Earth is the only planet in our solar system that's not named after a god or goddess.
17