Italy's Winter Olympics promised sustainability. But in Cortina, environmentalists warn the Games could scar these mountains for decades.

Chile is freezing its future to protect its plants.

We join a group of mudlarkers to see what's hiding by a creek in Philadelphia, as contributors ask what mudlarking, scavenging the banks of rivers or creeks for treasures, can uncover.

The announcement comes just days after NPR revealed the administration had secretly rewritten safety and environmental standards.

Strong winds can make it feel a lot colder than the thermometer suggests. Protect yourself by covering exposed skin and sheltering inside.

The wind chill in Easton, Pennsylvania, was below zero on Wednesday.

The winter storm left a record number of people in Nashville without power.

Freezing temperatures and heavy snow and ice hit a large portion of the United States over the weekend.

Freezing rain and sleet are weighing down trees, which are now toppling and wreaking havoc.

Before he was the CEO of the outdoor gear company Patagonia, Ryan Gellert was just a kid who liked going outside.