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As Alaska jousted with the federal government in federal court Tuesday over whether new oil and gas exploration could be conducted in the Arctic National Wildlife Refuge, Sen. Lisa Murkowski was defending her position on opening the potentially oil-rich refuge.

Alex DeMarban
A Dec. 22 nomination by Public Employees for Environmental Responsibility to establish an Aleutian Islands National Marine Sanctuary has received opposition from some local communities in the region. John Messick
A subsidiary of Aleut Corp. will pay a $500,000 civil fine and another $200,000 for compliance measures for violating its oil discharge and prevention plan five years ago, as part of a settlement announced Tuesday by the Alaska Department of Law.Dan Joling
Ending with cold settling in around Anchorage Saturday, temperatures in the city were an average of 8.3 degrees above normal for 36-day span.Brian Brettschneider
Alaskans are three times as likely as Americans as a whole to know about ocean acidification and be worried about it -- but not entirely clear on the scientific process that is changing the chemistry of the oceans.Yereth Rosen
A new approach to measuring methane leaks revealed that the Boston area alone lost enough natural gas during one year to fuel 200,000 homes.Pete Spotts
The Federal Subsistence Board voted to allow gillnetting primarily targeting sockeye salmon on Alaska's Kenai Peninsula, though the potential to harvest other species of fish, like Dolly Varden and the beleaguered king salmon, was a sticking point in the discussion.Rashah McChesney and DJ Summer | Peninsula Clarion
At high tide, more water piles on top of geological faults, adding to the stress already there. If the fault is close to slipping, tides can trigger small tremors -- or, perhaps, larger quakes.Ned Rozell
Conservation groups have been cheering Gov. Bill Walker’s removal of several high-level officials at the Alaska Department of Fish and Game, moves that signal a shift in the state’s approach to land management, permitting and public involvement.Nathaniel Herz
Along with increasing sea levels, melting glaciers are putting something else into the world’s oceans -- a huge load of organic carbon that could change marine ecosystems, says a newly published study by a team of mostly Alaska scientists.Yereth Rosen