<unfollowing intensifies>
@St_Rev complicated mating structures? high paternal investment with social monogamy + cheating
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@sarahdoingthing I seem to remember reading something about them being extra bad in humans specifically but I may be misremembering. -
@St_Rev oh yeah menstruation - 2 more replies
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@sarahdoingthing brain growth -> ultra high risk of pregnancy vs. strong selection for bigger heads?Thanks. Twitter will use this to make your timeline better. UndoUndo
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@sarahdoingthing On further review, seems like placentas started out horrible and in some mammals have become less horrible. Not humans tho.Thanks. Twitter will use this to make your timeline better. UndoUndo
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