Follow-up q, why is parasitism so rare phenomenon in mammals? (vampire bats are the only clear example, human candidates are all debatable)
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@vgr@sarahdoingthing@emareaf I'm 8 months and just learned this, it's kind of terrifying. -
@vgr@sarahdoingthing@emareaf apparently when fetus wants more calories, its brain dumps hormones into placenta, sets off labor cascade.
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