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The Arctic permafrost is 1,000 years old. As it thaws, scientists worry what it might unleash

www.usatoday.com The Arctic permafrost is 1,000 years old. As it thaws, scientists worry what it might unleash

Scientists, medical professionals and officials at the Pentagon are increasingly concerned about the potential organisms that have sat in permafrost.

The Arctic permafrost is 1,000 years old. As it thaws, scientists worry what it might unleash
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