Milk has a peculiar history. It's baby food for mammals, but humans continue to drink it way past infancy. We've learned to make cheese, yogurt, butter, and ice cream with it. And we drink milk from species other than our own, which is all kinds of weird. Is there any harm in that? The answer, of course, is "it depends." Which is the answer to pretty much all dietary controversies. Kurzgesagt gives us the state of the research about drinking milk. -via reddit