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Female choice of males based on nuptial gifts.
Bluehead wrasse males with yellow females of the species. If the blueheaded male is removed from a t
Mother giraffe and calves feeding. It is mostly the females that raise young, and they may gather in
The vulva, sagittal section illustrating how the labia majora and labia minora cover and protect the
Risk of death from motorcycle accidents (dashed lines) and passenger accidents (solid lines) per 100
In many societies, manhood is not bestowed upon males simply because they reach a certain age. ...