Mars had an oxygen-rich atmosphere around 4 billion years ago
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Jupiter is bigger than all the other planets combined.
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The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
10
The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
219
If NASA sent birds into space they would soon die; they need gravity to swallow.
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MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
18