Minor changes turned Black Death germ from mild to murderous
Tuesday, June 30, 2015 - 16:50
in Paleontology & Archaeology
WASHINGTON (Reuters) - The bacterium Yersinia pestis has inflicted almost unimaginable misery upon humankind over the centuries, killing an estimated 200 million or more people and triggering horrific plagues in the 6th and 14th centuries.