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Trump cancels Denmark visit over Greenland spat

Why might Donald Trump want to buy Greenland?

Plastic particles falling out of sky with snow

Why is there plastic in Arctic snow? Video, 00:01:44Why is there plastic in Arctic snow?

Radiation 16 times normal after blast, Russia says

Rocket mystery: What was Russia testing?

Hunting for 'the world's purest water' Video, 00:00:54Hunting for 'the world's purest water'

Secret Cold War base shifts through Greenland ice

The Arctic is on fire - how bad is it?

Russia wildfires art: 'Siberia is burning'

Science In Action. The snowball effect of Arctic fires. Audio, 27 minutesScience In Action

Norway finds big radiation leak from Russian sub

Radiation leaks from Russian Arctic sub wreck. Video, 00:01:00Radiation leaks from Russian Arctic sub wreck

Russian submariners buried after fire. Video, 00:00:50Russian submariners buried after fire

Russia buries naval crew killed in nuclear sub fire

Russia mini-sub fire: Putin issues heroism awards

Battery caused deadly fire on Russian secret sub

Why I dress up as a polar bear for science. Outlook. Audio, 00:06:40Why I dress up as a polar bear for science

Scientists 'speechless' at Arctic fox's epic trek

Swimming in the Arctic with Down's syndrome. Video, 00:03:33Swimming in the Arctic with Down's syndrome

Fossil proves hyenas once roamed Arctic

Hungry polar bear wanders into Russian city

Hungry polar bear roams around Russian factory. Video, 00:00:33Hungry polar bear roams around Russian factory