Five questions about Ethiopia's controversial Nile dam

Ethiopia said this week it had hit its first-year target for filling the Grand Ethiopian Renaissance Dam, a concrete colossus 145 metres (475 feet) high that has fuelled tensions with downstream nations for nearly a decade.

Taking a landslide's temperature to avert catastrophe

Engineers from Duke University have developed a comprehensive new model of deep-seated landslides and demonstrated that it can accurately recreate the dynamics of historic and current landslides that occur under various conditions.

page 16 from 40