A new study found a possible solution to this paradox in the skeletal remains of a lost tribe of nomads who herded cattle across the steppes of western Asia 5,000 years ago. It turns out that the nomads carried genetic mutations that most likely protected them from pathogens carried by their animals, but that also made their immune systems more sensitive.
We are taking ancient human genomics to a whole new level, said Eske Willerslev, a geneticist at the University of Copenhagen who led the effort.
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