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.
Earthquakes on the Mississippi: The New Madrid Seismic Zone
Rising Rock: Earth's Crust Has Its Own Tides, Too
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
Will a town in southern Missouri be the epicenter of the next 'big one'?
By Mark Mancini May 14, 2018
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 May 2, 2018
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
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
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
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
Sea level change, plastic pollution and invasive species aren’t just political issues — they’re likely signs of a new epoch called the Anthropocene, geologists say.
By Jonathan Strickland Sep 1, 2016
The uncut gem is 3 billion years old and may fetch $70 million.
By Kathryn Whitbourne Jun 28, 2016
Snorkelers found what looked to be the ancient ruins near the Greek island of Zakynthos, but not all that glitters is gold.
By Jesslyn Shields Jun 13, 2016
Why Mockingbirds Mock
Why Is Blackface Controversial? Just Look at Its History
Changing Livestock Feed Might Help Save the Planet