/r/askscience
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If I were moving at the speed of a bullet and shot a bullet backwards, where would the bullet end up?
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How many years will it be until the 'maps' NASA sent out on the interstellar probes to locate Earth will no longer be useable by possible aliens who pick them up?
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I keep reading about how Covid has had a worse effect on minorities in the US particularly blacks. Is this all because of environmental/societal reasons, or do people of African decent actually have a harder time with the virus physically?
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If I had a flashlight in a zero-G vacuum environment, infinite battery and switched it on, how long would it take before the ejected photons generate movement?
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