If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
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Saturn's moon, Mimas, not only looks like the Death Star, it also has a Pac Man heat signature.
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The population of the Earth has more than doubled since 1950.
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On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
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Pluto is smaller than Russia.
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An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
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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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