For decades, the Arlington radio station has helped the U.S. military communicate with its submarine fleet. It's also one of Russia's top nuclear targets.
Doing the work to make old buildings more energy efficient isn’t as sexy as filling our roads with electric cars, but these smaller efforts are making a difference.
Across the border in British Columbia's Skagit River headwaters, a proposed open-pit mine has drawn protests from Native tribes, environmentalists and politicians.
A still image from Perpetual Ocean, a visualization showing ocean surface currents around the world produced using a high-resolution model of the global ocean and sea-ice.
