polar

"Alaska's Changing Environment" provides people with timely, reliable and understandable information on topics ranging from temperature and precipitation changes to salmon and polar bears.

Researchers believe they have found possible evidence that polar bears lived in Scotland during the last ice age.

Researchers only detected the gas recently, because it used to be notoriously hard to measure and earlier work focussed on warmer oceans, whereas the polar oceans are the emission hotspots.

By the 1930s, it’s estimated that fewer than 30,000 turkeys survived — which is roughly how many polar bears exist today.

In the case of polar sea ice, which is melting at a pace unrivaled by any period in the past 1,500 years, a reversal would entail halting melt and reestablishing ice cover.