Astronauts get taller when they are in space.
224
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
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
Jupiter is bigger than all the other planets combined.
254
The population of the Earth has more than doubled since 1950.
151