• About
  • Special Reports
  • Topics
    • Climate
    • Earth Science
    • Oceans
    • Space & Planets
    • Health & Ecosystems
    • Culture & Policy
    • Education & Careers
    • Opinions
  • Projects
    • Postcards From the Field
    • ENGAGE
    • Editors’ Highlights
    • Editors’ Vox
    • Eos en Español
    • Eos 简体中文版
    • Print Archive: 2015–2025
  • Policy Tracker
  • Blogs
    • Research & Developments
    • The Landslide Blog
  • Newsletter
  • Submit to Eos
  • AGU.org
  • Career Center
  • Join AGU
  • Give to AGU
  • About
  • Special Reports
  • Topics
    • Climate
    • Earth Science
    • Oceans
    • Space & Planets
    • Health & Ecosystems
    • Culture & Policy
    • Education & Careers
    • Opinions
  • Projects
    • Postcards From the Field
    • ENGAGE
    • Editors’ Highlights
    • Editors’ Vox
    • Eos en Español
    • Eos 简体中文版
    • Print Archive: 2015–2025
  • Policy Tracker
  • Blogs
    • Research & Developments
    • The Landslide Blog
  • Newsletter
  • Submit to Eos
Skip to content
  • AGU.org
  • Career Center
  • Join AGU
  • Give to AGU
Eos

Eos

Science News by AGU

Support Eos
Sign Up for Newsletter
  • About
  • Special Reports
  • Topics
    • Climate
    • Earth Science
    • Oceans
    • Space & Planets
    • Health & Ecosystems
    • Culture & Policy
    • Education & Careers
    • Opinions
  • Projects
    • Postcards From the Field
    • ENGAGE
    • Editors’ Highlights
    • Editors’ Vox
    • Eos en Español
    • Eos 简体中文版
    • Print Archive: 2015–2025
  • Policy Tracker
  • Blogs
    • Research & Developments
    • The Landslide Blog
  • Newsletter
  • Submit to Eos

geochemistry

A brilliant green mineral juts out from a chunk of blackish rock dotted with other patches of green crystals.
Posted inNews

Olivine May Have Given Life a Jump Start

by Elise Cutts 1 February 20241 February 2024

A mineral common throughout the solar system nudges a reaction that produces sugar molecules from formaldehyde.

Schematic illustrating the model applied in this study.
Posted inEditors' Highlights

New Constraints on Sulfur Cycling in the Prebiotic Earth

by Susan Trumbore 12 January 20248 January 2024

Experiments constraining rates of aqueous reactions and photolysis coupled with a global model constrain the abundance and chemical speciation of sulfur in early Earth’s atmosphere and oceans.

In this photograph of Jiang Co, a cloudy sky casts shadows over low hills in the background while the lake water, in the midground, features gray-blue-green tones. Spiky tufts of brown grass grow on the shores in the foreground, with dark angular cobbles studding reddish sand.
Posted inNews

Mammal Droppings Preserve Human and Climate History on the Tibetan Plateau

by Alka Tripathy-Lang 11 December 202327 September 2024

Geochemical signatures in sediment, which includes organic molecules from human and animal poop, help scientists track the rise and fall of the Tibetan Empire.

A portion of a cream-colored planet covered with pale swirls and partially in shadow is shown against the blackness of space broken by pinpoints of light. A hazy atmosphere is visible around the planet.
Posted inNews

These Four Exoplanets Have Wild, Rocky Weather

by Elise Cutts 7 December 20237 December 2023

On many exoplanets, conditions are so exotic that minerals form clouds and fall as rain. Recent studies revealed the rocky weather on these four exoplanets in more detail than ever before.

Side view of the ocean surface.
Posted inNews

An Electrifying Approach to Carbon Capture

by Bill Morris 7 December 20237 December 2023

A new sodium-ion “battery” promises an environmentally friendly method of sequestering carbon in the ocean, but experts remain cautious.

A row of black volcanic scones in Halema’uma’u in Hawaii eject lava into the air. The background is obscured by smoke from the lava.
Posted inResearch Spotlights

Humans Have Boosted Atmospheric Mercury Concentrations Sevenfold

by Rebecca Dzombak 3 November 20233 November 2023

A new baseline of volcanic contributions to the global mercury cycle reveals how drastically human activities have increased the element’s concentration in the atmosphere.

A flaming asteroid entering a planet’s atmosphere
Posted inNews

Meteor Impact Site Holds 200-Million-Year-Old Atmospheric Snapshot

by Elise Cutts 19 October 202329 November 2023

Minerals formed in short-lived hydrothermal systems set off by a meteor impact in France preserved information about noble gases in the ancient atmosphere.

Photo of a clam with close up images below.
Posted inEditors' Highlights

Ultra-High-Resolution Age Model in Clams Yields Daily Paleo-Data

by Branwen Williams 18 October 202317 October 2023

Using geochemical techniques, scientists identify daily cycles in fossilized giant clams, which permits climate reconstructions at the weather timescale.

A large forest fire burns on a mountainside.
Posted inNews

Natural Nitrogen Emissions Are Rising in California

by Nathaniel Scharping 13 October 202313 October 2023

Wildfires and soil microbes are releasing more nitrogen oxides in California as the climate gets warmer and drier.

Photo of the red Martian surface
Posted inNews

Ancient Mars May Have Had a Cyclical Climate

by Vijay Shankar Balakrishnan 29 September 202329 September 2023

Hexagonal structures in sediments are evidence of repeated wet and dry conditions on the Red Planet.

Posts pagination

Newer posts 1 … 4 5 6 7 8 … 25 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

Making a Map to Make a Difference

11 February 202611 February 2026
Editors' Highlights

Rocky Shore Erosion Shaped by Multi-Scale Tectonics

16 February 202613 February 2026
Editors' Vox

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

10 February 202610 February 2026
Eos logo at left; AGU logo at right

About Eos
ENGAGE
Awards
Contact

Advertise
Submit
Career Center
Sitemap

© 2026 American Geophysical Union. All rights reserved Powered by Newspack