Casey Clark and Courtney Sessum of the University of Alaska Fairbanks collect samples for testing from walrus bones unearthed at the Point Franklin archaeological dig on Wednesday, September 23, 2015, at the Barrow Arctic Research Center. 

Erik Hill
While talking with two friends just inside a university entranceway, I saw a creature scampering in our direction just outside the glass doors. My first though was of a misdirected red squirrel running on the concrete. But this guy was longer, and bounded like a Slinky. A weasel!Ned Rozell

At a lab in Barrow, researchers affiliated with the University of Alaska Fairbanks are cutting into old Pacific walrus bones discovered at a site near Point Franklin on Alaska's Arctic coast. 

Erik Hill
The alert level at Mount Veniaminof, which has seen at least six eruptions since 2000, was raised again early Thursday.Chris Klint
Glacier runoff due to climate change could contribute 6 inches to sea-level rise by 2100, says the first major analysis of likely global melting. Asaf Shalev

Supplies are ferried from the US Fish and Wildlife Service research boat R/V Tiglax to Buldir Island in the Aleutians during a trip from Adak Island to Attu Island on a week long research mission in southwestern Alaska, on Tuesday, June 2, 2015. Scientists on the R/V Tiglax conduct research in the Alaska Maritime National Wildlife Refuge.

Lauren Rosenthal
Three hundred miles west of Adak, Buldir Island is the most isolated island in the Aleutian chain. It's also more ecologically intact, making it a magnet for seabirds -- and for a special breed of scientists willing to spend a summer alone researching them.Lauren Rosenthal
Time is running out to submit comments on NOAA's draft 2015 U.S. Arctic Navigational Charting Plan, which aims to create detailed Arctic navigational charts using new technology.Yereth Rosen
Dave Klein was 47 when he kicked into a scree slope in Atigun Canyon and saw something unusual in the rocks below. He reached down and picked up a three-inch wedge of bone or antler that had been worked into points on each end. Ned Rozell
Documenting the frozen waters of a fjord in the Norwegian archipelago of Svalbard, an international team of scientists found high levels of reproductive activity and feeding across the marine environment.Asaf Shalev