"The ice is clearly feeling the influence of the bottom of the ocean," says researchers Daniel Watkins.
Smoke from a Siberian wildfire may have transported enough nitrogen to parts of the Arctic Ocean to amplify a phytoplankton bloom, researchers say.
A new tool that uses lasers to measure glaciers is small enough to fit in a backpack and be carried up steep mountains.
Polar bears that hunt from freshwater ice in Southeast Greenland are "the most genetically isolated population of polar bears anywhere on the planet."
Sea ice around Antarctica retreats more quickly than it advances, an asymmetry that's puzzled scientists. New research suggests it's actually pretty simple.
Narwhals are facing a new enemy in the Arctic. Noise from ships, mine blasts, and seismic surveys stress them out, even when it comes from miles away.
Killer whales are spending more time lingering in parts of the Arctic Ocean that are increasingly ice-free.
The world's ice is shrinking by 33,000 square miles a year, according to the first ever global asessment of the Earth's cryosphere.
An area once considered to be a potential last refuge for ice-dependent animals in the Arctic is already showing signs of ice loss.
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