Scientists have discovered the oldest known evidence of plague, dating back 5,500 years, through analysis of ancient DNA extracted from hunter-gatherer remains found in Siberia. The research indicates the disease impacted human communities millennia before documented outbreaks in Europe and Asia. This discovery pushes back the timeline of plague’s emergence and offers new insights into its evolutionary history. Researchers analyzed the genetic material of individuals buried in Siberia, identifying traces of *Yersinia pestis*, the bacterium responsible for the plague. The findings suggest the plague was present in the region long before previously thought, potentially originating in Central Asia and spreading westward. This research could reshape understanding of how the plague has impacted human populations throughout history and its long-term evolution. The study provides valuable data for tracking the pathogen’s spread and potential future outbreaks.