The dark skies in the Arctic Circle recently shone with ethereal multi-colored light. But this jaw-dropping spectacle was not caused by auroras. Instead, the iridescent rainbows were caused by clouds of tiny ice crystals floating higher in the atmosphere than is normally possible. The clouds, known as polar stratospheric clouds...
Amazing new photos and video of the elusive red lightning called sprites are helping researchers understand how the mysterious electric bursts form. Sprites last less than a second as they dance on the tops of thunderstorms. Many viewers say the clusters of charged particles look like jellyfish — big, red...