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 Desert Is Getting Bigger
How Does Petrified Wood Form?
This One's More Than Two Months' Salary: World's Largest Diamond Up for Auction
How are crystals made?
13,000-year-old Footprints Found in British Columbia
Our World Is Rich With Places to See Real Dinosaur Tracks
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 Apr 5, 2018
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.
By Kristen Hall-Geisler Mar 28, 2018
Petrified wood can be found all over the world, but how is it created?
By Mark Mancini Mar 5, 2018
Scientist have figured out why two historic avalanches happened on the same unlikely slopes within weeks of one another.
By Ian O'Neill Jan 26, 2018
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 Dec 12, 2017
Geologists agree that the world's landmasses were once all one supercontinent. Is it likely to happen again?
By Mark Mancini Dec 6, 2017
The beautiful scenery in Washington state hides a darker history. It was formed by a gigantic volcanic eruption that cooled the planet.
By Laurie L. Dove Nov 16, 2017
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.
By Jesslyn Shields Nov 10, 2017
Researchers discovered that everyone's favorite prehistoric cat had some seriously big bones — even as a youngster.
By Robert Lamb Sep 29, 2017
Archaeologists discovered what they believe to be ruins of the Roman city of Neapolis — underwater near Tunisia.
By Michelle Konstantinovsky Sep 11, 2017
Scientists have found that snow and rain trigger earthquakes. Could their study help predict the Big One?
By John Perritano Jun 22, 2017
Antarctica's Blood Falls looks like a geological horror scene. For decades, scientists weren't sure why. Until now.
By Kate Kershner May 3, 2017
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 Apr 7, 2017
You might be in trouble when the end of the world is near, but at least your data won't be.
By Jonathan Strickland Apr 4, 2017
Surprisingly, living in a city with a high level of natural radiation doesn't have any ill effects.
By Alia Hoyt Mar 27, 2017
The prehistoric penguin was the size of a small adult human, which says a lot about penguins' evolution.
By Shelley Danzy Mar 14, 2017
And archaeologists figured it out with just a little DNA.
By Kate Kershner Mar 6, 2017
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.
By Jesslyn Shields Feb 27, 2017
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.
By Jesslyn Shields Feb 22, 2017
The Cuvette Centrale peatlands hold astounding amounts of carbon scientists had never fully mapped. The new discovery emphasizes a need for protection.
By Jesslyn Shields Jan 23, 2017
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.
By Jesslyn Shields Dec 19, 2016
Decades after the massive conflict, reminders of battles linger in pristine Pacific waters.
By Christopher Hassiotis Dec 7, 2016
Recent icebergs and unexpected glacial rifts are indicating that something troubling is going on beneath the ice.
By Jesslyn Shields Dec 2, 2016
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 Dec 1, 2016
Could this new underwater find shed light on the enigmatic ancient computing device known as the Antikythera Mechanism?
By Christopher Hassiotis Sep 21, 2016
The Wild Back and Forth of Netflix's 'Wild Wild Country'
Scientists Closer to Developing a Bee-friendly Pesticide
A Compendium of Fart Facts, Plus One Gaseous Podcast