History.Com reports. For 18 months the lights were out.The Byzantine historian Procopius wrote: “The sun gave forth its light without brightness, like the moon, during this whole year.”He added: “Men were free neither from war nor pestilence nor any other thing leading to death.”The catastrophic darkness led to temperatures of 1C across a Europe and Asia, with China even recording summer snow.Michael McCormick, a history professor, told History.com previously: “It was a pretty drastic change; it happened overnight.“The ancient witnesses really were onto something.
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