/r/askscience
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How much salt would I need to be able to float in my bathtub as if it were the Dead sea, would it work?
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In movies/tv they say there are always a percentage of people who are naturally immune to new diseases, is this true and are there people naturally immune to COVID-19 specifically?
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What is the minimum number of pre-filled spaces on a standard 9*9 sodoku puzzle that will give a single solution?
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