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the thing that confuses me is that the way that some people are searching for dark matter is actually the same thing that people looking for black holes are doing (the gravitational lens effect). so obviously if the people looking for dark matter see a gravitational lens they will claim its dark matter but if the people searching for black holes see one they will claim its a black hole.
there are so many theories about the universe that you could say well when we find out which one is right, who lives in the others?
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