/u/manu_facere's posts in /r/askscience
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When you look at the mirror do your eyes focus on the distance between your eyes to the mirror or to the percieved image?
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I read that we release some stress hormones in tears. Does the process still work if the tears are caused by other causes?
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Is there a scenario where you could time travel to 150 m years bc and not trigger a butterfly effect?
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