Whatever Happened To … The Melting Permafrost?

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The Permafrost Tunnel Research Facility, dug in the mid-1960s in Fairbanks, Alaska, allows scientists a three-dimensional look at frozen ground.





Kate Ramsayer/NASA



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Kate Ramsayer/NASA



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Nadia Whitehead is a freelance journalist and science writer. Her work has appeared in Science, The Washington Post and NPR. Find her on Twitter@NadiaMacias.

• permafrost


• pathogens


• climate


• global warming