Geology

Tall, many-armed star dunes are common in deserts worldwide, but scientists know little about the histories of these formations.

Researchers have discovered a large gas reservoir boasting extremely high concentrations of helium that could boost a dwindling global supply in Minnesota's Iron Range.

Magnetic data suggest Seattle's fault line formed 55 million years ago, when the southern half of a subducting chain of volcanic islands piled onto the continent and tore apart from the northern half.

Earth's crust once formed a dense "root" supporting Colombia's northern Sierra Nevada de Santa Marta mountains, but new research suggests this prop sank into the mantle millions of years ago.

Researchers uncovered fossils of multicellular eukaryotes that are over a billion years old.

Fjords, many of them sculpted over many ice ages, can form all over Earth. So why does Norway have so many?

Giant exploding craters only known to exist on Russia's permafrost-covered Yamal and Gydan peninsulas may result from a specific set of conditions not found elsewhere in the Arctic.

The Indian plate may be peeling into two as it slides under the Eurasian plate, tearing Tibet apart in the process.

Diamonds seem to reach Earth's surface in massive volcanic eruptions when supercontinents break up, and they form when continents come together.

Scientists have identified three definitive supercontinents in Earth's history and predict the landmasses we live on today will come together again in the future.