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The mystery begins when archaeologists find a hastily dug mass grave of 4,000 men, women, and children in London.
At first they assume it’s a plague pit from the Black Death, but when they date the bones, they turn out to be too old by a century. The chronicles of that time describe a run of wild weather that devastated crops and spread famine across Europe.
Here, in the heart of London, archaeologists uncover a surprise. DON WALKER (Museum of London Archaeology): When we find mass burial pits, we know that there's been a lot of people dying very quickly, and something has gone very wrong.
Nearly 750 years ago, this volcano’s colossal explosion shot a million tons of rock and ash every second into the atmosphere. What would happen if another such cataclysm struck again today?
Killer Volcanoes PBS Airdate: October 25, 2017NARRATOR: Our planet is capable of unleashing extreme chaos.
Volcanoes, earthquakes, hurricanes and floods can cause untold devastation.
We may think we've seen the worst Mother Nature can throw at us, but scientists struggling to understand these disasters are discovering evidence that even more extreme events have struck in the past.
The victims all died around 1250 in the Common Era.