NASA's Landsats captured views of a Swiss glacier 40 years apart, showing how a warming world has reduced its footprint.

Satellite images taken more than three decades apart show the disappearance of Iceland's Okjökull, the first glacier to be ...

Ingenuity proved beyond a shadow of a doubt that a helicopter can operate on another planet. Over 72 flights, the little ...

The best way to experience the White Mountains’ Presidential Range is hiking between the Appalachian Mountain Club’s eight historic high-mountain huts. Connecting distances aren’t ridiculous—the ...