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geochemistry

Exoplanet near a star
Posted inNews

Chemical Patterns May Predict Stars That Host Giant Planets

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 25 June 20197 March 2022

Stars with giant planets tend to have a few key elements in abundance. A new algorithm used these patterns to predict hundreds of stars that will likely have exoplanets if we go looking for them.

Man collects water from a pipe to put in a test tube.
Posted inNews

Ancient Water Underlies Arid Egypt

Mary Caperton Morton, Science Writer by Mary Caperton Morton 18 June 20196 February 2023

A hidden trove of groundwater is left over from the last ice age.

Underwater photo of bleached staghorn coral
Posted inResearch Spotlights

The Effect of Coral Bleaching Events in the Great Barrier Reef

by David Shultz 31 May 201923 February 2023

A new study using seawater chemistry compares the status of the iconic reef before and after a bleaching event.

X-ray tomography images of experimental magmas captured at different crystal contents
Posted inEditors' Highlights

Crystals Connect Bubbles in Explosive Magmas

by S. D. Jacobsen 28 May 20195 October 2022

Hydrous silica-rich magmas can degas through connected bubble pathways when as little as 20% crystals are present, influencing transitions from explosive, Vulcanian-style eruptions to lava effusion.

An orca feeding on a seal
Posted inResearch Spotlights

A Look at How Long-Banned PCBs Persist in the Ocean

Aaron Sidder, freelance science writer by Aaron Sidder 7 May 201921 March 2022

A new study tracks how climatic factors like sea ice cover and ocean circulation affect the life span and distribution of polychlorinated biphenyls in the world’s oceans.

Atlantic Ocean
Posted inResearch Spotlights

Water, Water Everywhere—But How Much H2O?

by E. Underwood 2 May 20199 February 2022

A new study quantifies the abundance of single and bonded H2O molecules in the ocean.

Tracers of ecosystem respiration
Posted inResearch Spotlights

Understanding Stream Metabolism with Reactive Tracers

Aaron Sidder, freelance science writer by Aaron Sidder 29 April 20197 March 2022

When the blue dye resazurin encounters living microorganisms, it transforms into fluorescent pink resorufin and helps scientists understand ecosystem respiration, but it has its limitations.

Drone photo of a shoal in the Turks and Caicos Islands
Posted inResearch Spotlights

Old Idea Spurs New Research into Origins of Carbonate Mudstones

Aaron Sidder, freelance science writer by Aaron Sidder 12 April 201926 October 2022

Using modern techniques, scientists tested an old hypothesis about carbonate mud production to shift the thinking about rocks that are used as seawater archives and a source of petroleum.

Artwork by Anastasia Grigoryeva depicting solar wind as it affects the Martian atmosphere
Posted inResearch Spotlights

How Mars Lost Steam

by E. Underwood 11 April 201915 March 2023

Solar winds are not the main culprit in stripping the planet’s atmosphere, a new study suggests.

Artist’s depiction of a newly forming solar system, which preserves conditions of its birth in isotopes and their ratios for billions of years
Posted inFeatures

Isotope Geochemists Glimpse Earth’s Impenetrable Interior

Lucas Joel by L. Joel 1 March 20195 January 2022

Painstaking measurements of isotopes and their relative abundance in rocks have illuminated the hidden inner Earth and our planet’s origins and shadowy past for much of the preceding century.

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Features from AGU Publications

Research Spotlights

Paleoclimate Patterns Offer Hints About Future Warming

15 September 202515 September 2025
Editors' Highlights

Rising CO2 and Climate Change Reorganize Global Terrestrial Carbon Cycling

17 September 202517 September 2025
Editors' Vox

Experienced Researcher Book Publishing: Sharing Deep Expertise

3 September 202526 August 2025
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