Mars had an oxygen-rich atmosphere around 4 billion years ago
13
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
12
An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
9
Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
46
If two pieces of metal touch in space, they become permanently stuck together.
808
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