Earlier samples of Yersinia pestis DNA have been found in skeletons dating from 3000–800 BC, across West and East Eurasia.[14] The strain of Yersinia pestis responsible for the Black Death, the devastating pandemic of bubonic plague, does not appear to be a direct descendant of the Justinian plague strain. However, the spread of Justinian plague may have caused the evolutionary radiation that gave rise to the currently extant 0ANT.1 clade of strains.[15][16]