Mass hysteria? Ergot poisoning? Or just despair? Here’s why what started as one woman’s dance spiraled into one of history’s ...

In this Aug. 10, 2019 file photo, a sign warning of bubonic plague is displayed at a parking lot near the Rocky Mountain Arsenal Wildlife Refuge in Commerce City, Colo. The bacteria which causes the ...

The Black Death was one of the most infamous pandemic events in history. It spread across Asia and Europe, decimating a third of the continent’s population during the Middle Ages. The cause was plague ...

While medical treatment and sanitary improvements have lessened its impact, the bubonic plague — responsible for the Black Death in the 14th century — could still be alive in your backyard. Early in ...