All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
If you went out into space, you would explode before you suffocated because there's no air pressure.
149
The Earth weighs around 6,600,000,000,000,000,000,000 tons (5,940 billion billion metric tons)!
221
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 unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
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 heart of an astronaut actually gets smaller when in outer space.
216