Stephanie Pappas

A two-peaked mountain in northeastern China is the site of the world's first confirmed mountaintop crater.

Researchers have discovered a pattern where diamonds spew from deep beneath Earth's surface in huge, explosive volcanic eruptions.

A new type of chemistry performed at very cold temperatures on very small particles enables quick, precise reactions.

Though Earth's innermost core is solid, new research suggests that it hosts a lot of variation.

Scientists have found a white dwarf that is cooling and crystallizing into a giant diamond.

A new search for extraterrestrial life has scientists looking inward — toward the center of our galaxy.

Asteroid 2023 DZ2 will zip between Earth and the moon's orbit on March 25 and may be visible with the right telescope.

The newly discovered comet C/2023 A3 is making a close approach around the sun for the first time in 80,000 years, and might be as bright as a star in fall 2024.

NASA's Curiosity Mars rover has photographed clear signs of ripples locked into a Martian rock, a sign of an ancient lake on the Red Planet's surface.

The Winchcombe meteorite was collected mere hours after it fell, but researchers have found that it was already contaminated with earthly minerals, including common table salt.

Researchers have created a never-before-seen form of ice with a disorganized structure and a density almost exactly that of liquid water.

A type of crystal that breaks the rules of ordinary crystallography has been found in a tube of melted sand from Nebraska.

A new search for alien signals focuses on planetary transits, when exoplanets pass right in front of their suns.

The Quadrantid meteor shower is considered one of the best to view all year. Here's how to maximize your chances of seeing shooting stars.

Scientists are getting a better handle on how fast Greenland's ice is flowing out to sea. Old models that used Antarctica as a baseline were way off the mark.

Fossils called stromatolites from Western Australia were created by microbes 3.48 billion years ago.

Water driven toward Earth's center by plate tectonics could lead to the creation of diamonds at the boundary between the core and the mantle.

An ancient piece of crust is hiding below Western Australia, having survived 4 billion years of upheaval.

A document thought to have been handwritten by Galileo Galilei is in fact a 20th-century fake.

Protons can contain a charm quark, an elementary particle 1.5 times heavier than the proton itself.

For the first time, authorities have given a heat wave a name. Scientists hope that naming extreme heat events will help the public protect itself.

A loud explosion heard Saturday (Aug. 13) in Utah may have been an exploding Perseid meteor.

A 66 million-year-old impact crater has been discovered off the coast of West Africa, raising questions about just how many deadly space rocks the dinosaurs had to deal with.

At 'supercriticality,' the difference between the liquid and gas phases of a material seems to disappear. New research finds that this weird tipping point may be simpler than scientists thought.

The Siberian tundra could disappear by the year 2500, unless greenhouse gas emissions are dramatically reduced.