The US has had a military presence in Greenland since World War II. But an abandoned underground military site poses a major environmental threat as the planet warms. Researchers found thousands of ...

The base is abandoned, but the U.S. Army left some waste behind.

Add Yahoo as a preferred source to see more of our stories on Google. Part of a portable nuclear power plant arrives at Camp Century in 1960. Bettmann Archive/Getty Images In a tunnel 40 feet beneath ...

Men of the U.S. Army Polar Research and Development Center set up communications at the temporary camp used during the construction of Camp Century, an Arctic U.S. military research base in Greenland.

While flying over Greenland and using advanced radar technology to map the continent's ice, NASA scientists discovered something incredible, an abandoned Cold-War-era U.S. military base 100 feet under ...