Scientists have long opposed polar geoengineering. Some now believe it will be necessary.

An increasing number of bears had been observed spending more time on land during the summer, plundering birds’ nests in west ...

A potent winter storm is upending parts of the Southeast and Mid-Atlantic with snow, damaging winds and dangerous coastal flooding.

That’s thanks to another gem of the meteorological world called the “polar jet stream” — sort of like a river of fast-moving air high in the atmosphere that dips down to allow cold air to flow from ...