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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The sun is 330,330 times larger than the earth!
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The temperature of the earth's interior increases by 1 degree every 60 feet down.
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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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Jupiter's moon Ganymede, is larger than the planet Mercury!
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