eli5 :Why do cows have four nipples?

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Why is it that cows have four nipples where as many other large herbivorous mammals have only two?

In: Biology

A simple google search will reveal, “Unlike goats and sheep, which divide their udders in half, cows divide it into quarters. They have two ligaments that suspend the udder and are arranged kind of in a cross. Russ suspects evolution has pushed towards these four individual milk bags in order to avoid injury.”