An international team of researchers has found the DNA of Y. pestis in a 4,000-year-old domesticated sheep from the fortified Bronze Age settlement of Arkaim, in the southern Ural Mountains in present-day Russia, which marks the first confirmed case of a Bronze Age plague infection in a non-human host. It proves that livestock played a role in prehistoric plague dynamics.The sheep was associated with the Sintashta-Petrovka cultural complex, which was known for its sophisticated metallurgy, horse riding, and large, mobile herds. Genetic studies indicate that the bacterium found in the sheep belongs to the Late Neolithic–Bronze Age plague lineage that...