Video: Below ground in the Fairbanks permafrost tunnel

Ancient microbes, unusual ice structures, mammoth bones — there’s a lot happening below the surface in the Fairbanks Permafrost Tunnel Research Facility. The underground laboratory, operated by the Army Corps of Engineers, is kept at a constant 27 degrees Fahrenheit. Environmental science researcher Dr. Andrew Balser leads a tour of the facility and discusses the research taking place there.