News tagged with polar ice

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Polar bear births could plummet with climate change

University of Alberta researchers Peter Molnar, Andrew Derocher and Mark Lewis studied the reproductive ecology of polar bears in Hudson Bay and have linked declining litter sizes with loss of sea ice.

Feb 08, 2011
2.2 / 5 (5) 0

Polar bear's long swim illustrates ice melt

In one of the most dramatic signs ever documented of how shrinking Arctic sea ice impacts polar bears, researchers at the U.S. Geological Survey in Alaska have tracked a female bear that swam nine days across ...

Feb 03, 2011
3.7 / 5 (6) 6

Polar bears can't eat geese into extinction

As the Arctic warms, a new cache of resources -- snow goose eggs -- may help sustain the polar bear population for the foreseeable future. In a new study published in an early online edition of Oikos, resear ...

Nov 04, 2010
5 / 5 (1) 2

Crew circles North Pole in one summer

A trimaran sailing boat circled the North Pole in a single summer season, a feat made possible by global warming and the melting of the Arctic ice cap, the boat's international crew said Thursday.

Oct 14, 2010
2.8 / 5 (4) 2

Strange Martian Spirals Explained

Almost 40 years ago, NASA's Mariner 9 spacecraft relayed to Earth the first video images of Mars' northern polar ice cap, revealing a strange pattern of spiral swirls that has puzzled scientists ever since. ...

Jun 16, 2010
4.4 / 5 (12) 5 | with audio podcast