If two pieces of metal touch in space, they become permanently stuck together.
808
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
The Earth gets heavier each day by tons, as meteoric dust settles on it.
118
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
The population of the Earth has more than doubled since 1950.
151
There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
20