Researchers have uncovered the oldest known evidence of plague infections in Siberian burial sites, dating back approximately 5,500 years. The discovery pushes the documented history of Yersinia pestis infections back by 200 years and reveals its devastating impact on ancient hunter-gatherer societies. The findings were published across multiple scientific reports on June 17-18, 2026. The Guardian+2
The bacterial pathogen Yersinia pestis was identified in remains from Siberian cemeteries near Lake Baikal, showing the plague existed centuries earlier than previously believed. Genetic analysis confirms this strain caused fatal infections in prehistoric populations, contradicting earlier theories that ancient forms were less virulent. The study appeared in Nature journal. The Independent+1
Evidence suggests the plague caused significant deaths among hunter-gatherer communities, particularly affecting children. Burial sites show patterns consistent with rapid population decline, indicating the disease's severe impact on early human settlements in the region. Researchers note this challenges previous assumptions about prehistoric disease dynamics. CBC News+1
The discovery reshapes understanding of how ancient diseases influenced human migration and societal development. The Siberian findings demonstrate the plague's presence during a critical period of Eurasian prehistory, potentially explaining unexplained population collapses in the archaeological record. Further studies are planned at additional Neolithic sites. The Independent+1