If two pieces of metal touch in space, they become permanently stuck together.
808
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194
More than 20 million meteoroids enter Earth's atmosphere every day.
139
The center of the galaxy tastes like raspberries and smells like rum, according to astronomers.
4
Today's top fuel dragsters take off with more force than the space shuttle.
120
A comet's tail always points away from the sun.
2