
Cattle herders in South Sudan are part of a dairying tradition that stretches back at least 6000 years, according to a new study.
Now, scientists have found some of the oldest evidence yet for dairy drinking: People in modern Kenya and Sudan were ingesting milk products beginning at least 6000 years ago. That's before humans evolved the "milk gene," suggesting we were drinking the liquid before we had the genetic tools to properly digest it.
All humans can digest milk in infancy. But the ability to do so as an adult developed fairly recently, likely in the past 6000 years. A handful of mutations allows adults to produce the enzyme lactase, which can break down the milk sugar lactose. Genes that enable what's called lactase persistence are widespread in modern Africa, which has four known lactase persistence mutations. (European populations rely on just one.)














Comment: Mongolians survive extremely well in their harsh climate, in part thanks to their consumption of dairy and the essential fat and protein that it provides them with. As the article suggests, and as seems to be the case with agriculture, it seems that one of the primary drivers behind the consumption of dairy was due to environmental pressures, and in particular climatic upheaval. It's also notable that it's only in humanities recent history that we turned to farming, and then dairy: