Science / Biology / Placental Mammals: One of three groups of mammals that carry their young in the mothers body for long periods during which the fetus is nourished by the placenta. Humans are placental mammals.
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Science / Biology / Placental Mammals: One of three groups of mammals that carry their young in the mothers body for long periods during which the fetus is nourished by the placenta. Humans are placental mammals. MORE