/r/askscience
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Why is it that we jolt awake when we fall asleep for 5 minutes [or so] in a class for instance or theater...etc?
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If the moon is pulling away from the Earth at approximately 1-2 inches each year, how long would it take for it to lose orbit with us? Also, what affects would that have on the Earth?
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When your foot falls asleep, why does it tingle so much and why is it so sensitive when it comes in contact with anything else?
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