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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There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
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Lightning strikes about 6,000 times per minute on this planet!
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The moon is actually moving away from Earth at a rate of 1.5 inches per year.
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In space, astronauts cannot cry properly, because there is no gravity, so the tears can't flow down their faces!
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The temperature of the earth's interior increases by 1 degree every 60 feet down.
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Jupiter's moon Ganymede, is larger than the planet Mercury!
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