Concept
Version 13
Created by Boundless
Culture and Biology
![Guildford Cathedral relief (UK)](../../../../../../../../../figures.boundless-cdn.com/974/full/guildford-milking.jpeg)
Guildford Cathedral relief (UK)
People began domesticating cattle many years before they developed the genes for lactose tolerance.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"Guildford-Milking."
http://commons.wikimedia.org/wiki/File:Guildford-Milking.JPG
Wikimedia
Public domain.