The temperature of the earth's interior increases by 1 degree every 60 feet down.
115
Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
160
Sound doesn't travel in space.
255
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
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
It 'snows' metal on Venus.
13