Geology is the study of the composition and physical properties of rocks, minerals, gems and other related earth materials, including diamonds and crystals. Scientists gain an understanding of the Earth's history by studying its composition.
This white-hot metal not only makes beautiful jewelry, it's coveted for industrial, medical and military purposes too.
The U.S. is full of exceptional geological formations. But these five set the bar high as far as landmarks go.
You can see these rocky formations in the Badlands of Nebraska, and they're as awe-inspiring as they are eerie.
If fettuccine rock exists on Mars, it would suggest the existence of microbial life there.
To honor their prehistoric pasts, most U.S. states have designated official state fossils, ranging from trilobites to dinosaurs. Take our quiz to learn more!
Caves are full of incredible geological formations, including stalagmites and stalactites. But you've probably never seen anything like cave popcorn before.
"Will draw dinosaurs for food" is what they like to think they do. But it's actually way more complicated.
Scientists set up two stations to capture this strange seismic activity.
The decades-old geyser was created by accident when a geothermal company tried to drill a well. Now the strange geyser is open to tourists for the first time ever.
Massive gypsum crystals were discovered beneath Mexico's Sierra de Naica Mountain in very inhospitable environs — to humans anyway.
Many scientists believe that humans influence Earth at a rate so massive that a change to the geologic time scale is in order.
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.'
Researchers hypothesize that missing rocks from the geologic record, known as the Great Unconformity, were sheared away by glaciers at a time when most — or all — of the world's surface was coated with ice.
How, in today's world, could a cave this massive go undetected for so long?
Twitter was abuzz with reports that pretty green gems were spewing out of the Kiluaea volcano in Hawaii. But the experts took the shine off these speculations.
Will a town in southern Missouri be the epicenter of the next 'big one'?
The oceans on planet Earth cycle through daily tidal changes. But the ground beneath our feet experiences tides of its own, too.
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.
Archaeologists discovered three sets of human footprints on a remote island off the coast of British Columbia. They've now determined these footprints are the oldest in all of North America.
Petrified wood can be found all over the world, but how is it created?
Scientist have figured out why two historic avalanches happened on the same unlikely slopes within weeks of one another.
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.
Geologists agree that the world's landmasses were once all one supercontinent. Is it likely to happen again?
The beautiful scenery in Washington state hides a darker history. It was formed by a gigantic volcanic eruption that cooled the planet.
Where on the planet can you visit to see with your own eyes the tracks left by dinosaurs? Fossilized dino footprints might be just outside your back door, but here are good places to start.