"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."

"A research vessel located and photographed two critically endangered North Pacific right whales off the coast of Alaska."

"The trend could spell disaster for caribou (and more nasty bites for humans)."

"One of the coldest places on Earth is so hot it’s melting. Glaciers, sea ice and a massive ice sheet in the Arctic are thawing from toasty air above and warm water below. The northern polar region is heating up twice as fast as the rest of the planet and that’s setting off alarm bells."

"The federal government has reached an agreement with local Inuit that will lead to the protection and management of a massive swath of northern sea in one of the most ecologically sensitive regions of the Canadian Arctic."