NASA studies Mars more than scientists know about our oceans. The Red Planet is the most studied celestial body, and a new ...

In his latest video, Ben Ayers discusses the puffy coat, insulated pants, sleeping bag, and sunglasses that helped him thrive at 17,500 feet ...

RJ Nagarajan's story isn't about strength; it's about determination. This senior is redefining what is possible with grit and ...

Because of potential water and a source of heat, Olympus Mons has been suggested as a place to look for potential alien life; ...

"To the discerning eye, other mountains are visible—giants between 23,000 and 26,000 feet high. Not one of their slenderer ...

A new panorama from NASA's Mars Odyssey orbiter shows Arsia Mons, one of the largest volcanoes on Mars, rising above a thick ...

Father Ninian Doohan, 44, raised a chalice during a Mass celebrated 17,598 feet up from the Khumbu valley at Mount Everest Base Camp, using a hewn stone as his altar. Holy Mass offered for peace ...

SPOKANE, Wash. — One local family is grateful to welcome their daughter back home after her mountain climbing achievement. Two weeks ago, Katelyn Sims was scaling Mt. Everest, the tallest ...

Climbing Mount Everest may get even harder. A new proposal from Nepal aims to tighten requirements and improve climber safety on the world's tallest peak, but such proposals rarely become law.

Katelyn Sims remembers reading books about Mount Everest in the third grade. A couple of weeks ago, she found herself standing on top of it. Sims, 34, summited Mount Everest around 11 a.m. on May ...

AP’s team in Kathmandu typically relies on third-party visuals to cover the annual influx of climbers attempting to summit Mount Everest. But this year, photographer Niranjan Shrestha had a new idea: ...

The latest Mount Etna eruption triggered an avalanche of volcanic material and sent ash miles into the air. Spectacular photos and videos capture the eruption of Europe's largest active volcano.