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I like that idea of "mental doppelgangers"!

and as usual with any news headline involving evolution, it's worded the wrong way round. It should say something like "Fed urban birds have tended to survive more" i.e. looking ba…

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"By an odd coincidence, at least two other people were independently inspired at about the same time" I wasn't aware that there had been other cubes ( at least 1 using the same mec…