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French scientists revive 30,000-year-old virus locked in Siberian frost

French scientists said Monday they had revived a giant but harmless virus that had been locked in the Siberian permafrost for more than 30,000 years. Wakening the long-dormant virus serves as a warning that unknown pathogens entombed in frozen soil may be roused by global warming, they said. Dubbed Pithovirus…

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