Geology

Pink diamonds form when the gems' crystalline structure gets bent under intense pressure.

Geologists Unravel the Mysteries of Australia's Rare Pink Diamonds

The dazzling, blush-colored gems likely emerged from Earth's mantle some 1.3 billion years ago, when a supercontinent named Nuna broke up, study suggests

Aspen Brown unearthed the golden-brown diamond while visiting Crater of Diamonds State Park with her family.

Girl Celebrating 7th Birthday Finds 2.95-Carat Diamond

Aspen Brown stumbled upon the pea-sized, golden-brown gem while visiting an Arkansas park

Marc Abrahams, creator of the Ig Nobel Prizes, speaks at the 2003 ceremony. The first ceremony was held in 1991.

Smart Toilets and Licking Rocks: Ig Nobel Prizes Celebrate Strange Scientific Achievements

Winning research projects reanimated dead spiders and examined how anchovy sexual activity influences ocean mixing

Geochemist Blake Dyer observes the north shore of Molokai.

Scientists Look to Ancient Hawaiian Reefs for Clues About Future Sea-Level Rise

Researchers search the shores of Molokai for fossils to help predict the impact of melting ice sheets on our oceans

The surface of Mars’ Pontours rock contains a network of hexagonal mud cracks that hints at historical seasons of flooding and drying.

Mud Cracks on Mars Hint at Conditions That Could Have Formed Life Long Ago

Hexagonal ridges on the Red Planet's surface suggest an ancient cycle of wet and dry periods, ideal for creating molecules necessary for cells

Taylor Swift performed at Lumen Field in Seattle on July 22 and 23.

Taylor Swift Concerts Are Generating Seismic Activity

The artist's two recent shows in Seattle shook the ground so much that they registered on a nearby seismometer

The historic railway is the highest in America.

You Can Now Take a Sunrise Train Ride to the Top of Pikes Peak

See the panoramic vistas from atop the 14,000-foot mountain that inspired Katharine Lee Bates to write "America the Beautiful"

Shipwreck NORMAN in upper Lake Huron in Thunder Bay National Marine Sanctuary

Eight of the Best Spots to Go Freshwater Diving or Snorkeling in the United States

These bucket-list underwater sites offer up megalodon teeth, manatee herds and other unique encounters

A boy looks at a water pump on a street in New York City. Between 1993 and 2010, researchers estimate that humans have pumped over two trillion tons of water out of the ground.

Humans Have Shifted Earth's Axis by Pumping Lots of Groundwater

Removing water from the ground has led to sea-level rise and caused Earth's axis to shift by about 2.6 feet between 1993 and 2010, per a new study

Mount Etna erupts in July 2021.

Secrets Still Smolder at One of the World's Most Active Volcanoes

A century after one of Mount Etna's many notable eruptions, scientists are more eager than ever to study the peak's frequent bursts of fiery fury

An observation point at Meteor Crater in Arizona

Seven Ways to Explore Space Without Leaving Earth

From astronaut training sites to working spaceports, these spots across the United States put a terrestrial spin on space travel

A picture taken in 2014 of the JOIDES Resolution, the ship used for the recent drilling expedition. 

Scientists Extract Rocks From Earth’s Mantle

They drilled into a mountain at the bottom of the North Atlantic Ocean

Kīlauea erupts early on June 7, after months of signaling it was getting ready to burst.

Hawaii's Kīlauea Volcano Is Erupting Again—Here's How to See It

The youngest and most active volcano on the Big Island, it's expected to draw thousands of tourists

The Indiana Statehouse, opened in 1888 and built—of course—with Indiana limestone.

Why Indiana Limestone Is One of America's Most Prized Building Materials

From the 19th century to today, a geological trove offers a strong foundation for the nation's cities

A high-temperature hydrothermal vent field discovered on Puy des Folles Seamount on the Mid-Atlantic Ridge at approximately 6,562 feet in depth.

See the Breathtaking Ocean Life Found at Deep-Sea Vents

An international team of scientists discovered new hydrothermal vents along the Mid-Atlantic Ridge releasing mineral-rich water hot enough to melt lead

Interest in gold prospecting is growing across the country as the value of gold rises.

Five Places Where You Can Still Find Gold in the United States

Lucky for you, these gold rush hot spots have not yet run their mining course

A team skis from the remote Taku D site to the Camp 10 sleeping quarters. Students often travel as much as 8 to 10 miles a day, carrying packs a third of their body weight.

These Students Are Part of a 75-Year Study to Map Alaska’s Glaciers

Traversing an icefield by foot and on skis, the young researchers experience one of the coolest classrooms in the nation

The sun sets over the Susquehanna River in northern Pennsylvania.

America's Waterways: The Past, Present and Future

In a series of articles, <em>Smithsonian</em> magazine highlights all that draws our eyes to our nation's fresh and coastal waters

A father shows his son the awful-smelling algae hugging the shoreline of the St. Lucie River during a summer bloom in Stuart, Florida, in 2016. The algae fouled coastal waterways, created angry communities, closed beaches and had an economic impact as tourists and others were driven away by the smell and inability to enjoy the waterways.

Florida’s Love-Hate Relationship With Phosphorus

The state has mined and abused the Devil's Element for decades, and now it is increasingly fouling precious coastal waters

Some scientists think that Earth&#39;s inner core is actually made up of two similar but distinct layers.

Scientists Find Evidence of Another Core Within Earth's Center

The newly proposed layer might have a different structure from the rest of the inner core

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