Black rivers of meltwater mixed with volcanic ash, spreading from the erupting Eyjafjallajökull volcano (Photograph courtesy Árni Sæberg, Icelandic Coast Guard) A seven-mile-high (11-kilometer-high) cloud of steam, smoke, and ash billows from Iceland’s Eyjafjallajökull volcano on Thursday (Photograph courtesy Árni Sæberg, Icelandic Coast Guard) Steam explodes from a glacier-topped Iceland volcano (Photograph courtesy Árni Sæberg, […]