How lactose tolerance in humans became widespread

Milk has often been branded as a superfood as it is rich in most of the nutrients necessary for health. However, how milk came to be an integral part of the human diet has been a conundrum to scientists because most of the world can’t digest the product. Studies on the global prevalence of this…

Ancient Europeans farmed dairy—but couldn’t digest milk

Over the past 10,000 years, populations living far apart in Europe, Africa, South Asia, and the Middle East separately acquired a key genetic change: the ability to digest the milk sugar lactose as adults. Researchers thought people who had that ability and lived in dairy farming cultures got a nutritional boost and had more children,…