Well, the first thing that has to happen is that the cow has to get pregnant. She has to be able to have a baby before she can make milk. Once the cow gets pregnant, there are these things called ...

But most importantly, mammal brains have adapted to make milk. When a dairy cow feeds its calf or gets milked, a chemical message zooms through its brain and body. That chemical message, oxytocin, is ...

This answer is fueled by coffee with a splash of milk from a dairy cow. I asked my friend Kimberly Davenport why my morning milk doesn’t come from a beef cow. She’s an expert in cow genetics at ...