More than half the Arctic's coastline is Russian territory and in the last six years Moscow has built more than 475 military ...

A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

For millennia, the Arctic-boreal zone has acted as a critical carbon reservoir, locking away vast amounts of carbon dioxide ...

The Arctic is one of the coldest and least populated regions on Earth, much of it covered by ice. But in recent years it has become one of the most important sites of geopolitical tensions — and ...

This map shows the Arctic’s average carbon balance ... event that is really unprecedented and surprising.” While the Arctic region heats up, its role as Earth’s cooling system weakens.