There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
15
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
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
A comet's tail always points away from the sun.
2
One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
277
All of the Earth's continents are wider at the north than in the south - and nobody knows why.
194