Geology

A new study of seismic data from Antarctica finds that the mantle may be stranger and more variable than previously believed, with pieces of ancient crust that have been dragged down by tectonic forces.

The planet's magnetic field may have collapsed around 600 million years ago, enabling a major oxygenation event and perhaps supercharging evolution.

The Cave of Crystals in Chihuahua, Mexico, is buried almost 1,000 feet (300 meters) beneath Earth's surface and contains giant gypsum crystal beams that are up to 37 feet (11 m) long.

Scientists have yet to reach the bottom of the Taam Ja' Blue Hole in Mexico's Chetumal Bay, which new measurements hint could be connected to a labyrinth of submarine caves and tunnels.

Researchers suggest that the famed Golconda diamonds, including the Hope Diamond and Koh-i-noor, may have originated from a volcanic outcrop nearly 200 miles from where they were mined.

Video cameras mounted on an autonomous underwater robot captured footage of cracks associated with mud volcanism close to a potentially active fault on the shores of Lake Baikal.

Laboratory results for a helium reservoir discovered in northern Minnesota suggest concentrations of the sought-after gas are the highest the industry has ever seen.

Finland's river crystals hold clues about the formation of 'Scandinavia's' oldest bedrock 3.75 billion years ago.

A metal detectorist has unearthed a gold nugget that is currently up for auction and expected to sell for over $37,000.

Earth is covered with water, but how much is hiding in our planet's crust?