Dares, Costly Signals, and Psychopaths http://www.ribbonfarm.com/2016/05/05/dares-costly-signals-and-psychopaths/ … new Ribbonfarm by me
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@sarahdoingthing I had always wondered how those mushroom encyclopedias came to be and that's the first explanation that convinces meThanks. Twitter will use this to make your timeline better. UndoUndo
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