Mars had an oxygen-rich atmosphere around 4 billion years ago
13
The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
Jupiter's moon Ganymede, is larger than the planet Mercury!
149
Sound doesn't travel in space.
255
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
Jupiter has radio storms so strong that they can be picked up and heard by an AM radio.
16
If two pieces of metal touch in space, they become permanently stuck together.
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