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New evidence suggests the Black Death bacterium caused the Justinianic Plague of the sixth to eighth centuries. The pandemic, named after the Byzantine emperor Justinian I (shown here), killed more than 100 million people. | Public Domain
History

Plague Helped Bring Down Roman Empire

The cause of the Justinianic Plague appears to be settled through new DNA evidence.

May 10, 2013
11:30 AM EDT