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A study sampling microplastics across the state is discovering where they are the most concentrated, with some clues as to why.
A recent paper reported avalanches killed between 23% and 65% of all the collared animals that had died during the 17 years biologists had followed them.
A pair of UAF engineering students will try to collect samples every 2,000 feet on Denali, in an effort to determine if the tiny plastic particles are as abundant there as they are elsewhere on Earth.
Researcher Ben Jones found working tools — several paddles and a spear with a stone tip — within the Lost Jim Lava Flow on the Seward Peninsula.
When the ice retreats it causes them to fragment into smaller bodies of ice, establishing more glaciers.
Astrophysicists Lindsay Glesener and Sabrina Savage wait for the conditions to be ideal before launching a pair of rockets loaded with testing instruments into the atmosphere.
Kunali was delivered from the Alaska Zoo in Anchorage to Fairbanks, where its skin, tissue and bones will aid scientists in the future.
An expert in space physics at the UAF Geophysical Institute, Peter Delamere finished third in the Iditarod Trail Invitational 350 bike race.
In the far north, where night will soon be in short supply, nocturnal animals like flying squirrels and owls need to go about their business in daylight.
None of the four members of the Salty Science team had rowing experience, but they managed to win the World’s Toughest Row women’s division after crossing more than 3,000 miles of ocean.
One Alaska geologist’s explanation: With a lack of the freeze-thaw process that other mountains experience, Denali doesn’t erode as quickly as others.
Water covering a trail known as aufeis happens because underground springs pump water toward the surface no matter how cold the air above.
Most are on or near volcanoes, with very hot water bubbling or steaming up from deep below, where Earth’s great crustal plates are grinding past one another.
The magic number is minus 30: That’s the Fahrenheit temperature threshold at which air is cold enough for ice fog to form.
The oranging of northern rivers seems to be related to recent permafrost thaw that has allowed streams to release previously captive iron, trace metals and acid.