Why do mammals have different nipple counts?
For example dogs and cats have more than 2 nipples while humans have only 2.
At what point in the evolution did this occured, how and why?
Also, is it possible for humans to have more than 2 nipples, in a sense that is not a rare occasion?
In: Biology
Dogs and cats give birth to a lot of babies so they need a lot of nipples to feed them.
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