An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
There are two golf balls sitting on the moon.
721
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
Astronauts get taller when they are in space.
224
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
A lightning bolt generates temperatures five times hotter than those found at the sun's surface!
127
The population of the Earth has more than doubled since 1950.
151