New insights concerning lactose tolerance and ancient African pastoralism published in Science Magazine.
https://www.sciencemag.org/news/2021/01/humans-were-drinking-milk-they-could-digest-it?fbclid=IwAR2RtthlCOpr85AhU2f8aWXtMYRefaDAKN1q1jTveVjU6UzCp2tKQB_O4gk