/u/RevRaven's posts in /r/askscience
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If 90% of all species who have ever lived are currently extinct, then what makes us think that saving critically endangered species is even worth it?
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Why are 3d projections of a 4d object like a tesseract always shown in motion? Shouldn't they be still?
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Looking at the Hubble XDF, I think I spy a galaxy with two black holes. Is that right? Has this been seen before? Link in text
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