An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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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.
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Jupiter is bigger than all the other planets combined.
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The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
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