The world’s oceans are acidifying at their fastest rate for 55 million years, scientists say, with unknown consequences for the most basic elements of the food chain, the plankton. Ian Randall reports.
Earth's Hottest Place
Dougal Jerram and Steve Smith visit active fissures and volcanoes in the hottest place on Earth (Afar, Ethiopia), and use the latest 3D laser scanning technology to build the ultimate 3D volcano as they look into the belly of the Earth.