• About
  • Sections
  • Topics
    • Climate
    • Earth Science
    • Oceans
    • Space & Planets
    • Health & Ecosystems
    • Culture & Policy
    • Education & Careers
    • Opinions
  • Projects
    • ENGAGE
    • Editors’ Highlights
    • Editors’ Vox
    • Eos en Español
    • Eos 简体中文版
    • Print Archive
  • Blogs
    • Research & Developments
    • The Landslide Blog
  • Newsletter
  • Submit to Eos
  • AGU.org
  • Career Center
  • Join AGU
  • Give to AGU
  • About
  • Sections
  • Topics
    • Climate
    • Earth Science
    • Oceans
    • Space & Planets
    • Health & Ecosystems
    • Culture & Policy
    • Education & Careers
    • Opinions
  • Projects
    • ENGAGE
    • Editors’ Highlights
    • Editors’ Vox
    • Eos en Español
    • Eos 简体中文版
    • Print Archive
  • 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
  • Sections
  • Topics
    • Climate
    • Earth Science
    • Oceans
    • Space & Planets
    • Health & Ecosystems
    • Culture & Policy
    • Education & Careers
    • Opinions
  • Projects
    • ENGAGE
    • Editors’ Highlights
    • Editors’ Vox
    • Eos en Español
    • Eos 简体中文版
    • Print Archive
  • Blogs
    • Research & Developments
    • The Landslide Blog
  • Newsletter
  • Submit to Eos

manganese

A panoramic view of rocky mounds on a rust-colored Martian landscape
Posted inNews

Does This Mineral Indicate Oxygen on Mars?

by Elise Cutts 30 January 202330 January 2023

Manganese oxides are thought to be a signature of atmospheric oxygen. But on the Red Planet, recent results suggest they might be more of a red herring.

A GEOTRACES research vessel in the Arctic Ocean
Posted inResearch Spotlights

Diurnal Oxidation for Manganese Minerals in the Arctic Ocean

by Morgan Rehnberg 13 January 202213 January 2022

The relative abundance of different oxidation states for this important micronutrient varies on the basis of how much available sunlight there is.

Margaritifera laevis shells on the bottom of a river.
Posted inNews

Freshwater Mussel Shells May Retain Record of Alpine Snowpack

by Stacy Kish 4 October 202129 March 2023

A new study explores a possible proxy for seasonal freshwater input that could elucidate changes in alpine snowpack as the planet warms.

Beach on barrier island Spiekeroog in Germany
Posted inResearch Spotlights

Microbial Mechanisms Change with the Seasons

Elizabeth Thompson by Elizabeth Thompson 1 April 202012 October 2022

Microbes living in the sand on a barrier island alter the way they break down organic matter as their environment changes throughout the year, which has implications for the surrounding water column.

Close-up image of gravel and dust on an asphalt
Posted inNews

Road Dust: A Health Hazard Hidden in Plain Sight

Megan Sever, Science Writer by Megan Sever 7 November 201912 October 2022

Legacy heavy metals from past industrial activity combine with traffic paint; asphalt; and bits of tires, brakes, and car parts to create toxic dust on our roadways.

Curiosity-rover-mineral-samples-liquid-groundwater-oxygen-atmosphere-Mars
Posted inResearch Spotlights

Minerals Hint at Liquid Groundwater, More Oxygen in Mars's Past

Sarah Stanley, Science Writer by Sarah Stanley 5 August 20163 January 2023

Manganese deposits in Gale Crater fractures are similar to Earth features that usually require flowing water and highly oxidizing conditions.

Posted inResearch Spotlights

Manganese Deposits on Mars Suggest a Highly Oxidized Past

by J. Rosen 18 November 201426 January 2023

Data from the Curiosity rover suggest that the surface of Mars has experienced more strongly oxidizing conditions than previously thought.

A view of a Washington, D.C., skyline from the Potomac River at night. The Lincoln Memorial (at left) and the Washington Monument (at right) are lit against a purple sky. Over the water of the Potomac appear the text “#AGU24 coverage from Eos.”

Features from AGU Publications

Research Spotlights

Deforestation Is Reducing Rainfall in the Amazon

19 May 202519 May 2025
Editors' Highlights

Bringing Storms into Focus

19 May 202515 May 2025
Editors' Vox

Decoding Crop Evapotranspiration

6 May 20256 May 2025
Eos logo at left; AGU logo at right

About Eos
ENGAGE
Awards
Contact

Advertise
Submit
Career Center
Sitemap

© 2025 American Geophysical Union. All rights reserved Powered by Newspack