The heart of an astronaut actually gets smaller when in outer space.
216
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
Approximately 115 tons of ocean salt spray enters the earth's atmosphere each second.
100
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
Astronauts get taller when they are in space.
224
The volume of the Earth's moon is the same as the volume of the Pacific Ocean.
178