A climatic catastrophe rocked the Earth in A.D. 535, causing two years of darkness, famine, drought and disease. Was it a comet? An asteroid? A volcano?

Written records from China, Italy, Palestine and many other countries suggest a huge catastrophe blighted the world in 536 AD. But the cause of it has been uncertain. Archaeologist David Keys reveals that a volcano is to blame for the Dark Ages of famine and plague that shaped the world order of today.

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