The Goal
The US military’s goal of digging this tunnel outside of Fairbanks was to study the natural phenomenon called permafrost, which is the term used to classify the type of frozen ground covering almost 85% of Alaska.
Permafrost
This study was important because permafrost has an impact on 25 percent of the Northern Hemisphere. This permafrost generally occurs when the ground is at freezing temperatures for more than a few years.
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