A new study tackles the question of how rising temperatures can change the activity of microorganisms in the Arctic. The study focuses on methane production rather than carbon dioxide — an important issue to understand because of methane's potency.Chelsea Harvey | The Washington Post
A petition filed with the U.S. Securities and Exchange Commission seeks an investigation into Shell financial reports that critics say gloss over risks to investors from offshore Arctic drilling.Yereth Rosen
Charles “Chuck” Hamel, a whistleblower who became the subject of an undercover spy campaign by the oil industry in Alaska a quarter-century ago, has died at a nursing home in Marysville, Wash. Alex DeMarban

Linking climate change with severe flooding in the Alaska village of Galena, Secretary of State John Kerry laid out an ambitious agenda to address greenhouse gas emissions and protect the Arctic Ocean as he accepted the reins of the eight-nation Arctic Council on Friday, April 24, 2015, at a ceremony in Canada.

Alex DeMarban
Alaska will take center stage now that the U.S. has taken the helm of the eight-nation Arctic Council, with Secretary of State John Kerry calling Friday for reductions in greenhouse-gas emissions and Alaska leaders highlighting economic development opportunities. Alex DeMarban
Growing numbers of Chinese tourists are expected to visit Finnish Lapland, and there are new ties between Finland and China's Sichuan province. YLE News
The tiny bits of plastic, from common household products, are flushed into the sea in large quantities. Marine creatures can easily mistake them for food. Radio Sweden
Researchers have deciphered the complete DNA code, or genomes, of two mammoths. The new genomes are far more refined than one announced in 2008.Malcolm Ritter | Associated Press
The U.S. will take over chairmanship of the Arctic Council on Friday, a change that will put Alaska at center stage for the council's focus on such things as climate change and Arctic infrastructure. Alex DeMarban
A survey of 10,000 people in the eight Arctic nations finds that only a minority know about the Arctic Council and its makeup. Still, survey respondents say they want the Arctic players -- even Russia -- to keep cooperating and to do so peacefully. Yereth Rosen