EarthThe survivors: Is climate change really killing polar bears? Rapid global warming is said to be ringing the death knell for polar bears, by melting their icy hunting grounds. But the reality is more complex Features
EarthRuptured Tibetan glaciers triggered massive speedy avalanches In 2016, a pair of glaciers suddenly collapsed and sent huge chunks of ice hurtling downhill. The events suggest such disasters are more common than we thought News