/r/askscience
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Dark matter is thought to not interact with the electromagnetic force, could there be a force that does not interact with regular matter?
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Are there any published reports of the increased risk of catching COVID during air travel and what are the findings?
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"At near-light speed, we could travel to other star systems within a human lifetime, but when we arrived, everyone on earth would be long dead." At what speed does this scenario start to be a problem? How fast can we travel through space before years in the ship start to look like decades on earth?
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Nowadays, dogs get vaccinated for several different fatal diseases. In the past, did lots of dogs just die of them?
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