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Ancient Alaskan Microbes May Reactivate Amid Warming Summers

10/15/2025

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Summary

Story summary

A University of Colorado Boulder study finds ancient microbes dormant in Alaskan permafrost for up to 40,000 years could reactivate as Arctic summers lengthen.
Growth was slow at first but changed notably after six months at warmer temperatures.
Released microbes could convert organic matter into carbon dioxide and methane, turning permafrost from a carbon sink into an emitter.
The study notes regional variations require further research to understand environmental impact.

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Story summary

A University of Colorado Boulder study finds ancient microbes dormant in Alaskan permafrost for up to 40,000 years could reactivate as Arctic summers lengthen.
Growth was slow at first but changed notably after six months at warmer temperatures.
Released microbes could convert organic matter into carbon dioxide and methane, turning permafrost from a carbon sink into an emitter.
The study notes regional variations require further research to understand environmental impact.