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oxygen

Strings of nanoscopic, black magnetite grains inside the bodies of magnetically sensitive bacteria are revealed under a microscope.
Posted inResearch Spotlights

Measuring Deep-Ocean Oxygen with Microscopic Magnetic Fossils

by Sasha Warren 15 October 202615 October 2026

A global comparison of microbial magnetic minerals unlocks a new tool for glimpsing the future of oxygen in Earth’s changing oceans.

Two people look out at the ocean over the starboard side of a research ship out at sea.
Posted inScience Updates

A New Twist on Robotic Float Data Reveals Critical Ocean Chemistry

by Mariana Bif 18 March 202618 March 2026

A novel application of a statistical method to existing data from the global network of BGC-Argo floats unveiled chemical measurements critical to tracking nitrogen cycling in oxygen minimum zones.

Daniel James instala un monitor de tasa de goteo en una estalagmita de flujo en la cueva Grutas Tzabnah en el estado de Yucatán, México, como parte de una campaña de monitoreo de cuevas.
Posted inNews

Grandes Sequias Coincidieron con el Colapso Maya Clásico

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 17 November 202517 November 2025

El entendimiento de cómo las ciudades individuales respondieron al estrés climático ayudará a crear imágenes holísticas de cómo estas sociedades funcionaban.

A researcher in a hard hat sits in a backlit cave with a small metal instrument.
Posted inNews

Major Droughts Coincided with Classic Maya Collapse

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 24 September 202524 September 2025

Understanding how individual cities responded to climate stress will help create holistic pictures of how these societies functioned.

Two people on the deck of a boat around sunset reach for an instrument—almost as tall as they are—being raised up over the side of the ship from underwater.
Posted inNews

Cruise to Measure Gulf Dead Zone Faces Stormy Funding Future

by Elise Plunk 5 September 20258 September 2025

Funding cuts are affecting The Pelican’s annual hypoxia cruise to investigate the environmental conditions off the coast of Louisiana.

A spherical, gray object with a mottled, shiny surface
Posted inNews

Fossilized Micrometeorites Record Ancient CO2 Levels

Katherine Kornei, Science Writer by Katherine Kornei 28 August 202528 August 2025

A cadre of iron-rich extraterrestrial particles picked up faint whiffs of our planet’s atmosphere when they fell to Earth millions of years ago.

Satellite view of swirling blooms of green algae and cyanobacteria in the Baltic Sea near the Swedish island of Gotland
Posted inFeatures

Could Bubbling Oxygen Revitalize Dying Coastal Seas?

by Caroline P. Slomp and Andreas Oschlies 1 May 20257 May 2025

Reoxygenation approaches have shown some success in lakes, but their potential risks must be examined carefully before they’re implemented as solutions to improve the health of coastal waters.

Acidic waters of the Rio Tinto in Spain
Posted inAGU News

A Planetary Perturbation Like No Other

by Caryl-Sue Micalizio 16 January 202527 January 2025

Scientists are tackling “the most profound questions about life itself” with complex computer modeling, billion-year-old bacteria, and old-fashioned fieldwork.

A cliff face with pink and red layers
Posted inNews

Bacteria Battled for Iron in Earth’s Early Oceans

by Caroline Hasler 15 November 202416 January 2025

Billions of years ago, iron-oxidizing microbes may have competed for dissolved iron in the ocean, with some strains producing toxic gases that smothered their rivals.

A close-up of a person holding a lumpy black blob between two fingers.
Posted inNews

Metallic Nodules Create Oxygen in the Ocean’s Abyss

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 30 July 202424 April 2025

These nodules, a focus of seabed mining interests, could be natural “geobatteries” and play a larger-than-expected role in the deep-sea ecosystem.

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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

A Decade of Carbon Dioxide Data from Space Gets an Upgrade

30 October 202630 October 2026
Editors' Highlights

Connecting Radio Wave Disruption to “Hot” Charged Particles from Afar

30 October 202630 October 2026
Editors' Vox

Opening Access to Earth Observation Data for Disaster Mitigation

21 October 202620 October 2026
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