Tag «yersinia pestis»

Plague 101 | National Geographic

Plague 101 | National Geographic

– [Narrator] Plague is notorious for causing mass sickness and devastation. But as much tragedy as the disease has caused, it also helped drive crucial scientific and social progress. Plague is an infectious disease caused by the bacterium Yersinia pestis. It mainly affects rodents, and spreads by way of insects. Because of these insect carriers, …

Wait For It…The Mongols!: Crash Course World History #17

Wait For It…The Mongols!: Crash Course World History #17

Hi I’m John Green; this is Crash Course World History and today we’re gonna discuss… wait for it… THE MONGOLS. So you probably have a picture of the Mongols in your head. Yes, that’s the picture: brutal, bloodthirsty, swarthy, humorously mustachioed warriors riding the plains, wearing fur, eating meat directly off the bone, saying, “Bar …