Geologic Processes

The U.S. is full of exceptional geological formations. But these five set the bar high as far as landmarks go.

By Mark Mancini

Permafrost across the globe is rapidly melting. What could this mean for the future of the planet?

By Mark Mancini

Petrified wood can be found all over the world, but how is it created?

By Mark Mancini & Desiree Bowie

How, in today's world, could a cave this massive go undetected for so long?

By Patrick J. Kiger

These ancient wonders aren't static sculptures; they vibrate and shift throughout the day, creating a variety of sounds as they stretch their aging, eroding 'bones.'

By Nathan Chandler

Massive gypsum crystals were discovered beneath Mexico's Sierra de Naica Mountain in very inhospitable environs - to humans anyway.

By Mark Mancini

Scientists set up two stations to capture this strange seismic activity.

By Mark Mancini

If geology has taught us anything about Earth's history, it's that nothing is permanent. And that goes for mountain ranges, all of which are constantly rising and falling.

By Mark Mancini

The oceans on planet Earth cycle through daily tidal changes. But the ground beneath our feet experiences tides of its own, too.

By Mark Mancini

Will a town in southern Missouri be the epicenter of the next 'big one'?

By Mark Mancini

The Sahara has expanded by about 10 percent in the past century, mostly due to natural causes, but not all. We can blame the rest on man-made climate change.

By Kristen Hall-Geisler

Talk about a Brexit! Scientists have clues to catastrophic flooding that destroyed a land bridge that once connected England and France.

By Patrick J. Kiger

Science has determined that disappearing completely into quicksand isn't possible - but that doesn't mean that getting stuck still won't kill you.

By Patrick J. Kiger

Surprisingly, living in a city with a high level of natural radiation doesn't have any ill effects.

By Alia Hoyt

The end of Earth will likely come about because of the sun in our solar system. This much you might already know, but we actually have an approximate date.

By Robert Lamb

The Pacific's Ring of Fire is a 25,000 mile long "ring" that's home to 75 percent of all the world's volcanic activity and 90 percent of the planet's earthquakes. So what makes this area so active?

By Mark Mancini

Trovants, found only in a small town in Romania, are stones that actually seem to move and grow. But are they alive?

By Jennifer Walker-Journey

Did you know that sand dunes can sing? And, their artistic curves certainly make for a gorgeous photograph. In fact, you might call the sand dune the diva of the desert.

By Debra Ronca