A remote-controlled underwater robot explores the underside of stable Arctic sea ice, collecting the most detailed information yet of this largely unexplored environment.
Inbreeding, poaching, a lack of herders and climate change are contributing to the iconic animal's decline.
Engineering methods to cool the climate could rescue humanity from its inability to control greenhouse emissions. That is, if it doesn't make the situation worse.
The Crocker Land Expedition, a largely forgotten early 20th century trek to northwest Greenland, resulted in the collection of thousands of scientific specimens and some of the first video footage from the Arctic.
Forward-looking models and polar bear energetics data foresee an alarming loss of habitat by the century's end.
The stark, barren landscape of Banks Island in Canada has yielded more than 8,000 shark teeth that date back millions of years.
Divers recovered a bronze bell from the wreck of the HMS Erebus, a British ship that was missing for nearly 170 years after an ill-fated expedition to the Canadian Arctic.
Arctic sea ice decline has doubled the chances of an extreme cold winter over Europe and Asia.
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