/u/kevin4789's posts
If you had a million mirrors placed in such a way that each would reflect off the next one, and you stand in front of one and move, would there be any lag between your movement and what appears on the final mirror?
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If we can lose hundreds of skin cells by scratching at them, why is it hard to rub off pen or marker on our skin?
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Are new viruses spontaneously mutated? In one million years will humans be immune to all viruses on Earth?
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