EarthSerene scene disguises colossal value of Canadian oil sands Photographer Louis Helbig has spent seven years chronicling the changes caused to the Canadian province of Alberta by petroleum extraction at the oil sands Regulars
EarthRussia has claimed the North Pole – but it's not the only one Even if Russia's revived bid to win extended seabed rights in the Arctic is accepted, there will be many more years of wrangling amid competing claims, says Martin PrattComment