
DNA from Ancient Siberian Graves Reveals Earliest Plague Outbreaks
Ancient DNA from teeth of 46 hunter-gatherers buried near Lake Baikal, Siberia, shows fragments of Yersinia pestis in more than one-third, marking two outbreaks beginning about 5,500 years ago—the oldest known plague. This challenges the view that mass disease outbreaks began with agriculture and suggests plague circulated in hunter-gatherer communities, possibly spreading via marmots.

