loading . . . How A 4,000-Year-Old Sheep Solved The Bronze Age Plague Mystery We all know the Black Death story. A third of Europe died. Fleas carried the deadly germ, Yersinia pestis, jumping from infected rats right onto people. But 5,000 years ago, a different, older strain of the plague was already circulating. This Bronze Age killer persisted for 2,000 years across a massive area of Eurasia, then simply disappeared. Here’s the puzzle: Unlike the Medieval version, this ancient bug couldn’t spread by fleas. https://scienceblog.com/how-a-4000-year-old-sheep-solved-the-bronze-age-plague-mystery/