Add Yahoo as a preferred source to see more of our stories on Google. Photo Illustration by Erin O'Flynn/The Daily Beast/Wellcome Images/Wikimedia Commons There is a legend that you may have heard ...

A person in California recently tested positive for plague, according to El Dorado County health officials. The individual ...

Add Yahoo as a preferred source to see more of our stories on Google. A large number of black rats swarming all over each other. The Black Death ravaged Europe between 1347 and 1353, killing millions.

Plague, one of the deadliest bacterial infections in human history, caused an estimated 50 million deaths in Europe during the Middle Ages when it was known as the Black Death.Video above: How did ...