People in northern and central Europe between 8000 and 4000 years ago increased in size while those in the rest of the world got smaller – and lactose tolerance may explain why
To measure the impact of lactose tolerance on the size of humans,at Western University in Ontario, Canada, and his colleagues collated data on 3507 skeletons from 366 archaeological sites in seven regions – the Levant, southern, central, and northern Europe, the Nile Valley, South Asia and China – going back to 30,000 years ago.
They found that the global mean height for men and women declined from 30,000 years ago onwards, reaching its minimum between 8000 and 6000 years ago. But in central Europe, stature increased between 7000 and 4000 years ago, while in northern Europe it increased between 8000 and 2000 years ago. Similar trends were seen for body mass.
However, the study found that people in Britain actually got smaller in the same period, despite being early milk drinkers.
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