The Evolution of Lactose Tolerance — HHMI BioInteractive Video

Transcript

[FOOTSTEPS] [MUSIC PLAYING] SPENCER WELLS: Only a small number of human beings live like this today. But from the time our species evolved some 200,000 years ago until the not-too-distant past, all of us lived as hunter-gatherers. Then around 10,000 years ago, people started domesticating animals for food, living in settlements, and cultivating cro... Read More