Geology

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.


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.

Researchers discovered that everyone's favorite prehistoric cat had some seriously big bones — even as a youngster.

Archaeologists discovered what they believe to be ruins of the Roman city of Neapolis — underwater near Tunisia.

Scientists have found that snow and rain trigger earthquakes. Could their study help predict the Big One?

Antarctica's Blood Falls looks like a geological horror scene. For decades, scientists weren't sure why. Until now.

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

You might be in trouble when the end of the world is near, but at least your data won't be.

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

The prehistoric penguin was the size of a small adult human, which says a lot about penguins' evolution.

And archaeologists figured it out with just a little DNA.

Although the trenched enclosures were probably used to conduct rituals, they can tell us how the ancient indigenous people of the Amazon managed their forests.

The American West may seem rugged, but it's a fragile environment. 21st-century flow levels for the Colorado are down 19 percent from 20th-century averages.

The Cuvette Centrale peatlands hold astounding amounts of carbon scientists had never fully mapped. The new discovery emphasizes a need for protection.

Most mammals have a penis bone called a baculum, but humans don't. A new study sheds light on the history of the baculum, and why ours is missing.

Decades after the massive conflict, reminders of battles linger in pristine Pacific waters.

Recent icebergs and unexpected glacial rifts are indicating that something troubling is going on beneath the ice.

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

Could this new underwater find shed light on the enigmatic ancient computing device known as the Antikythera Mechanism?