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[高清字幕]Health Report - Study Says Bubonic Plague Much Older Than Thought

来源:慢速英语   时间:2015-11-18 08:13:25

Health Report - Study Says Bubonic Plague Much Older Than Thought

Danish researchers examining ancient human teeth have discovered evidence of the plague from 4,800 years ago. In the middle 1300s, the disease killed 50 to 60 percent of Europe’s population. But the bacterium was not nearly as aggressive in its earlier form says the study leader.

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