40,000-Year-Old Microbes Reawaken in Alaskan Permafrost, Stir Climate Implications

TL;DR
Scientists thawed 40,000-year-old microbes from an Alaska permafrost tunnel and found them awakening after six months, forming biofilms and indicating life can resume after long dormancy; this slow reactivation could release carbon dioxide and methane as permafrost thaws, complicating climate models.
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