Andrea Mustain

The seismic jolts keep on coming.

This area hadn't seen a strong quake in centuries.

These secretive creatures were discovered only 20 years ago.

No relief in sight for drought-stricken areas of the country.

One chimney is as tall as a seven-story building.

Volcano's own gas bubbles reveal underground plumbing.

NASA scientists captured stunning footage during flights over the ice.

One twister moved over land and caused damage.

Authorities can sound the alarm seconds to minutes before shaking strikes.

It's not just lava that poses danger from volcanoes.

Famed Mount Etna took its time before its most recent lava explosion.

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

The wave saved a town 1,500 years ago, but tsunamis pose a real danger now.

Industrial practice may have some dramatic consequences.

The iconic birds are facing threats as Antarctic ice melts.

Scientists hope Cameron's vehicle will spark a new age of research and exploration.

Take a trip to a spot no humans have ever seen (and never leave home).

This was a different kind of quake.

Unexplored canyons captured in HD footage.

Scientists finally have long-hidden data from one of Earth's last unmapped places.

These guys run right toward the danger.

Photos of the restive mountain reveal a spectacular show.

Virgin Volcanic announced its plans on April 1.

The time-tested technique, combined with modern technology, produces incredibly accurate data.

From Maine to Texas, fall's leaves impress.