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geochemistry

A person’s right arm extends into the frame from the right over a running stream. The gloved hand holds a test tube partially filled with water that’s just been collected; a partial droplet of water is collecting at the bottom of the tube.
Posted inAGU News

The Persistence of PFAS

by Caryl-Sue Micalizio 30 April 20261 May 2026

Researchers around the world are seeking to search and destroy pervasive “forever chemicals.”

A large fjord with rocky, snow-covered mountains in the background
Posted inFeatures

Chemical Companies Are Churning Out New PFAS. Where in the World Are They Ending Up?

by Grace van Deelen 30 April 20261 May 2026

Bans on older versions of “forever chemicals” seem to be working. But emerging variants behave in ways that scientists are only beginning to pin down.

Yellow light shines through a layer of clouds onto the ocean below. A volcano is visible, in silhouette, in the distance.
Posted inNews

A Peculiar Polymer Paired with Sunlight Could Remove PFAS

by Emily Gardner 7 April 20261 May 2026

A new photocatalyst might help take the “forever” out of “forever chemicals” present in water.

Aerial view of an Atacama lithium mine shows three clusters of large rectangular evaporation ponds in shades of blue, teal, and pink scattered across a gray salt flat.
Posted inNews

Engineering a Cleaner Way to Extract Lithium

by Andrew Chapman 4 March 20264 March 2026

The new chemical solvent technique could cut water use, speed extraction, and unlock reserves like California’s Salton Sea.

Photo of the surface of Mars.
Posted inEditors' Vox

A Double-Edged Sword: The Global Oxychlorine Cycle on Mars

by Kaushik Mitra 10 February 202610 February 2026

Global detections of oxychlorine salts reveal a complex, 4-billion-year chemical cycle on Mars. They can act as de-icing agents, oxidants, a hazard and a vital resource for future human exploration.

The back deck of a boat as it moves through the ocean.
Posted inNews

The AMOC of the Ice Age Was Warmer Than Once Thought

by Grace van Deelen 10 February 202610 February 2026

An analysis of sediment cores indicates that North Atlantic waters were relatively warm and continued to circulate even under major climate stress during the Last Glacial Maximum.

A lake, seen from a rock on the shore, is mostly covered in ice but beginning to melt. The melting water is purple. On the other side of the lake, a rocky cliffside with evergreen trees is visible beneath a blue sky.
Posted inResearch Spotlights

How the Spring Thaw Influences Arsenic Levels in Lakes

by Saima May Sidik 6 February 20266 February 2026

Four lakes near Yellowknife, Canada, show that there’s no one-size-fits-all answer.

Composite image of the farside of the Moon, a gray surface heavily marked with craters.
Posted inNews

Primordial Impact May Explain Why the Moon Is Asymmetrical

by Matthew R. Francis 6 February 20266 February 2026

Analysis of surface samples from the Chang’e-6 mission suggests that an asteroid may have vaporized parts of the lunar mantle, suppressing volcanic activity on the farside of the Moon.

A production plant, consisting of many series of pipes stretching every which way and up into the sky, stretches off into the horizon.
Posted inNews

Meet the Mysterious Electrides

by Rachel Brazil 5 February 20265 February 2026

These chemical oddities may explain why Earth seems to be deficient in certain elements—and could prove useful in catalysts and more.

A black-and-white image shows the ends of dozens of soil cores, stored in a wall. A few of the slots are empty.
Posted inNews

How the Rise of a Salty Blob Led to the Fall of the Last Ice Age

by Emily Gardner 2 February 20262 March 2026

Scientists have long suspected that high salinity levels in the deep ocean were responsible for keeping carbon dioxide locked away during the last ice age. New research finds the strongest evidence yet.

Posts pagination

Newer posts 1 2 3 4 … 27 Older posts
Over a dark blue-green square appear the words Special Report: The State of the Science 1 Year On.

Features from AGU Publications

Research Spotlights

How Rising Air Plumes Help Spike Moist Heat

27 August 202627 August 2026
Editors' Highlights

Long-Term Datasets are Essential to Understanding Coastal Change

26 August 202618 August 2026
Editors' Vox

Climate Model Benchmarking: Building Trust and Advancing Science

24 August 202624 August 2026
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