Antarctica & Arctic

"Arctic sea ice behaves a bit like a human waistline, packing on weight in the winter and slimming down in the heat of summer. But while many of us struggle to lose weight, the Arctic has been struggling to gain it."

"In just eight days in mid-February, nearly a third of the sea ice covering the Bering Sea off Alaska's west coast disappeared. That kind of ice loss and the changing climate as the planet warms is affecting the lives of the people who live along the coast."

As climate change melts Arctic permafrost, it will release toxic mercury, scientists say.

"Polar bears are struggling to find enough seals to eat, and the problem will get worse as the planet warms because their metabolisms are much faster than previously thought, researchers said Thursday."

"It’s hard to miss a musk ox: It looks like a buffalo decked out in a hairy fur coat. And yet this easy-to-spot giant, which lives on tundras from Siberia to Greenland, is still surprisingly mysterious."

"Climate scientists say the magnitude and rate of sea ice loss this century is unprecedented in 1,500 years and issue a warning on the impacts of a changing climate."

"Delegations from the United States, Russia, and China and other countries struck a deal on Thursday to refrain from commercial fishing in the high Arctic seas, one of world’s fastest-warming places, until scientists can determine what fish are there and whether they can be harvested sustainably."

"A proposal for the first oil and gas drilling in federal offshore waters of the Arctic took a step forward Thursday as regulators released a draft environmental impact statement, which reflects concerns about the effects of the project on marine life and local communities."

"Hundreds of Pacific walruses came ashore to a barrier island on Alaska's northwest coast, the earliest appearance of the animals in a phenomenon tied to climate warming and diminished Arctic Ocean sea ice."