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hydrogen

Film reels are stored in an underground salt cavern.
Posted inFeatures

Salt of the Earth: Vast Underground Salt Caverns Are Preserving Our History—and Just Might Power Our Future

Korena Di Roma Howley, Science Writer by Korena Di Roma Howley 2 March 20262 March 2026

From health spas to film storage, salt mine caverns have been put to use in surprising ways—and they’re now poised to contribute to the generation and storage of clean energy.

A rocky structure on the seafloor has what appears to be black smoke coming out of it.
Posted inNews

A Mid-Ocean Ridge in the Norwegian Sea Pumps Out Hydrogen

Katherine Kornei, Science Writer by Katherine Kornei 3 February 20263 February 2026

Vent fluids collected from the Knipovich Ridge contain unexpectedly high concentrations of hydrogen, potentially produced by the degradation of organic matter.

Illustration of the Earth's internal structure.
Posted inEditors' Vox

Digging Deep into Interactions Between the Core and Mantle

by Takashi Nakagawa, Taku Tsuchiya, Madhusoodhan Satish-Kumar and George Helffrich 24 July 20234 August 2023

A new book presents major advances in our understanding of core-mantle interaction and co-evolution, and showcases technological developments improving our insights into deep Earth processes.

A satellite image of the surface of Mars showing snaking channels and other water-sculpted features
Posted inNews

Asteroid Impacts Could Have Warmed Ancient Mars

Katherine Kornei, Science Writer by Katherine Kornei 17 April 202317 April 2023

Hydrogen released during large impacts might have boosted Mars’s surface temperature above freezing for thousands or even millions of years, enabling liquid water to flow over the Red Planet.

Artist’s impression of a sub-Neptune or gas dwarf exoplanet
Posted inNews

Hydrogen May Push Some Exoplanets off a Cliff

by Julie Nováková 10 April 202310 April 2023

High-pressure reactions of hydrogen and iron could explain gaps in the distribution of exoplanets.

A long cylinder of ice on a table
Posted inNews

Ice Cores Record Long-Ago Seasons in Antarctica

by Caroline Hasler 17 March 202316 May 2023

Researchers used ice core data to reconstruct seasonal temperatures throughout the Holocene. The results link especially hot summers with patterns in Earth’s orbit.

Diagram showing the molecular hydrogen in Callisto’s atmosphere.
Posted inEditors' Highlights

Callisto’s H Corona: Offspring of the Surface or the Atmosphere?

by Beatriz Sánchez-Cano and Anni Määttänen 7 December 202222 July 2024

The mostly unknown Callisto’s H corona is created by a global tenuous H2 atmosphere and not by surface water as previously believed, providing the first evidence for H2 in Callisto’s atmosphere.

Researchers capture the first complete image of Earth’s geocorona
Posted inResearch Spotlights

Tracing the Path of Gas Atoms from Earth to the Final Frontier

by S. Witman 22 January 201817 January 2023

Scientists capture the first complete image of Earth’s luminous geocorona and prove its ecliptic north–south symmetry.

Posted inResearch Spotlights

Water Beneath the Surface of Mars, Bound Up in Sulfates

by S. Palus 14 April 20156 March 2023

Researchers present maps of hydrogen and sulfur that hint at water locked in hydrous sulfates in Mars's southern hemispheric soil.

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 Internal Waves Transport Energy Thousands of Miles Across the Ocean

26 March 202626 March 2026
Editors' Highlights

What’s Under the Water Matters

27 March 202626 March 2026
Editors' Vox

The Future of Earth’s Future

24 March 202624 March 2026
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