The moon is actually moving away from Earth at a rate of 1.5 inches per year.
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One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
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The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
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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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The Earth gets heavier each day by tons, as meteoric dust settles on it.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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