From the nitrogen in our DNA, to the calcium in our teeth, the iron in our blood, to the carbon in our apple pies - all were made in the interiors of collapsing stars; we're all made of stardust.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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Earth is the only planet in our solar system that's not named after a god or goddess.
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It 'snows' metal on Venus.
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Sound doesn't travel in space.
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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.
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