Ph.D. candidate to live among Sherpa mountain guides and study them.

Meet the other adventurers of the year for 2012.

This volcano is one of North America's most active.

How adventurous are you?

This novel method could help in the long run, but has some immediate applications.

Disappearing Arctic ice could have a chilling effect on other parts of the world.

Scientists spend weeks living out on the ice.

Glaciers could speed up and send more ice to the sea.

The studied rock is abundant but mostly out of reach.

Gravity satellite shows depth of boundary between crust and mantle.

Modeling of friction between fault rocks could improve understand of quakes.

GPS could improve quake and tsunami warnings.

Fossils and native wildlife abound.

Machu Picchu has become a popular tourist destination.

Park officials hopeful Horsetail Fall will flow through Feb. 24.

See a Civil Rights monument or knock a park off your bucket list.

This face is actually a dry salt lake in Australia.

That depends on what year you're looking at.

The oblique view from the ISS shows off the rugged Bernese Alps.

Odd circle has a more scientific explanation.

The natural bridge is the 12th largest on the planet.

Inner gorges were preserved through different glacial periods.

Show how you think NASA science has changed how we look at our home.

These rocks near the San Andreas Fault aren't feeling earthquakes for some reason.

Warmer weather melted ice, causing bedrock below to uplift.

This Greenland glacier produced a colossal ice berg last year, and may be set to do it again, thi...

See what's at stake and threats against them.

Fracking, mining and other practices threaten ecosystems.

Ireland's mild climate makes it lush with vegetation.

The American territory lies near the Marianas Trench.

Crystals took millions of years to reach current size.

Dripstones in Alps cave shed light on mountain growth, ancient climate.