Extensive evidence, including global temperature and sea ice data, shows Earth's climate is changing due to human activity.

The Arctic, which has always been known as an icy and remote wilderness, is undergoing extreme changes as warming in the ...

The coldest burst of Arctic air this season is coming to put an icy exclamation point on America's winter of repeated polar ...

Some maintain a tally of observations in a certain county, province, or country. A portion of a birder’s regional list is ...