Stephanie Pappas

Structures that scatter seismic waves deep in Earth's mantle seem to be everywhere researchers look.

Scientists just pulled the longest hunk of Earth's mantle from beneath the ocean.

New research hints that plate tectonics began earlier than 4 billion years ago — not long after Earth had formed.

An ocean that opened up in what is now Mongolia 410 million years ago was created by a hot upwelling of rock known as a mantle plume.

An atmospheric phenomenon known as STEVE has a secret twin that appears before the break of dawn and flows in the opposite direction, new research finds.

A vital Atlantic current that includes the Gulf Stream and keeps our climate in check may be giving off a warning sign of collapse.

New calculations suggest the sun is a few fractions of a percent smaller than previously estimated, and that could change how we study it.

Researchers have used a special crystal to bend the trajectory of light like a black hole would, a phenomenon known as 'pseudogravity.'

A long-lost tectonic plate dubbed 'Pontus' that was a quarter of the size of the Pacific Ocean was discovered by chance by scientists studying ancient rocks in Borneo.

A new ore, dubbed niobobaotite, was discovered in Inner Mongolia's Bayan Obo deposit.

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.