The volcanoes featured in the NOVA program "Volcano's Deadly Warning"—Galeras, Nevado del Ruiz, Popocatepetl, and Mt. Redoubt—as well as many other famous volcanoes, including Mt. St.

The blasts propelled rock and ash perhaps 25 miles into the sky above the island of Sumbawa. Volcanic gases, including sulfur dioxide, combined with moisture in the air to form vast toxic clouds ...

Solar System comes from BBC Studios and Nova, a popular science television program that broadcasts on PBS in the United States ... ranging from weather to volcanoes and ice – that relates ...