geology

When the volcano started rumbling, North Korean researchers realized they didn't have the tools to predict if it might erupt. So they reached out to Western scientists for help.

When you step into mud, it kind of slurps up between your toes. What if someone found your mud-slurping footprint 15,000 years from now?

Scientists have uncovered 15,000 year old fossil human footprints, with incredible, mud-slurping detail. What do they tell us about the people that lived there? 

In 1960, all of Chile shook violently for more than 10 minutes. That quake along the western coast of South America was so big, it changed the way people see the world.

Rock, once a seafloor of mud, sand, and pebbles, towers into the sky, only to erode away, becoming a new and different seafloor, layered like pages in a book.

Appalachian State University's Dr. Ellen Cowan reads these pages, most recently off the coast of Alaska. They tell the full story of geological changes on the continent, as written by glaciers over millions of years.

A misaligned curb in Hayward, Calif., was a popular destination for geology field trips. For decades it had reflected the shift of a major fault in the San Francisco area. But it has lost its appeal.

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Tension is building along a major fault in the seabed off Alaska's coast, research shows. Devastating tsunamis from sudden slips in certain sections could directly hit Hawaii and Central California.