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If evolution is effective, why do men still have nipples? In extreme situations, can fathers lactate?

Males secrete factors that block the development of female ducts and structures. Once the male embryo produces testosterone, the hormone can influence other sex-specific traits around the body. Men ...
Prince's user avatar
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1 vote

If evolution is effective, why do men still have nipples? In extreme situations, can fathers lactate?

Evolution tends to select out traits that are harmful (in quite simple terms) AND expressed soon enough to negatively affect reproductive success. Nipples (and breast tissue) on males are extremely ...
mismas's user avatar
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1 vote
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Why do only men have Adam's Apples? What is it? What function does it serve?

The Adam's apple, in conjunction with the thyroid cartilage which forms it, helps to protect the walls and the frontal part of the larynx, including the vocal cords (which are located directly behind ...
Prince's user avatar
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