/r/askscience
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If unexposed to sex their entire lives, would two humans (male and female) instinctually know how to have sex?
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How does something as large as a city affect the crust/mantle below it? Could a city become so large and heavy that it would collapse or compress the earth underneath?
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How, when, and why did bones evolve? Why do most vertebrate animals seem to share a basic skeletal structure?
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Why is high blood pressure considered a bad thing? Wouldn't a higher pressure make it less likely for cholesterol particles to stick to the walls of your arteries?
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