Japan's 'megaquake' warning explained

Japan's earthquake scientists say the country should prepare for a possible "megaquake" one day that could kill hundreds of thousands of people—although they stress the warning does not mean a colossal tremor is imminent.

Scientists uncover hidden forces causing continents to rise

Scientists at the University of Southampton have answered one of the most puzzling questions in plate tectonics: how and why "stable" parts of continents gradually rise to form some of the planet's greatest topographic features.