Plastiki, a 60-foot-long (18.3-meter-long) catamaran made of more than 12,000 plastic bottles, will soon ply the Pacific Ocean to increase awareness of environmental problems.Video
Long-dormant volcanoes—including in Yellowstone—can awaken in a matter of hours, spewing a superheated, fast-moving mix of toxic gas and ash, according to a new study of a massive 2008 eruption in Chile.