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A circular hole drilled into Gale Crater on Mars.
Posted inNews

Unraveling the Mystery of a Rare Mineral on Mars

by Clarissa Wright 7 September 20223 January 2023

The discovery of tridymite in Mars’s Gale Crater triggered debate about the rare mineral’s origins. A research team recently suggested a scenario with explosive implications.

A collage of different diatom species
Posted inNews

Ocean Acidification May Drive Diatom Decline

by Clarissa Wright 28 June 202212 September 2022

Diatoms contribute to global oxygen production, marine food webs, and carbon sequestration, but scientists predict that diatom populations will decline due to ocean acidification associated with climate change.

Northern California’s Eel River watershed
Posted inResearch Spotlights

Small Catchments Sustain Silicon Signatures Following Storms

by Jack Lee 10 June 202229 June 2022

Watersheds have unique patterns of silicon export due to differences in subsurface water routing and biogeochemical reactions.

Trays of perovskite silicon solar cells sit in a clear laboratory case.
Posted inNews

Better Together: Perovskites Boost Silicon Solar Cell Efficiency

by Mary Caperton Morton 23 September 20216 December 2022

Scientists engineer a way to layer materials to boost efficiency without interrupting manufacturing processes.

The Sun sets at Stonehenge
Posted inNews

State-of-the-Art Technology, Serendipity, and Secrets of Stonehenge

by Richard J. Sima 8 September 202121 March 2022

The first comprehensive analysis of what the sarsen stones are made of came about with new technology—and good old-fashioned luck.

A black-and-white collage of microscopic images of different Rhizaria
Posted inResearch Spotlights

New Recognition for Major Players in the Ocean’s Silicon Cycle

by Sarah Stanley 16 April 202012 October 2022

Tiny, shelled protists known as Rhizaria may be responsible for up to one fifth of the total amount of silica produced by the world’s oceanic organisms.

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.

Researchers analyze just how much silica is being transported across Earth’s oceans by phytoplankton
Posted inResearch Spotlights

The Tiny Organisms That Transport Silica Across Earth’s Oceans

by E. Underwood 29 June 201828 January 2022

Phaeodarians play a major role in marine nutrient cycle.

Cross section of a Monorhaphis chuni spicule showing its lamellae (rings).
Posted inResearch Spotlights

One of World’s Oldest Animals Records Ocean Climate Change

by M. Kumar 27 February 201814 December 2022

Researchers probe millennia-old deep-ocean sponges for links between ocean nutrients and climate.

Posted inResearch Spotlights

Accounting for the Missing Silica in the Marine Sediment Cycle

by Terri Cook 16 January 201828 January 2022

Cosmogenic silicon-based estimates of the amount of biogenic silica stored in clays along continental margins could explain the large discrepancy in the nutrient’s global marine budget.

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Features from AGU Journals

RESEARCH SPOTLIGHTS
JGR: Solid Earth
“New Tectonic Plate Model Could Improve Earthquake Risk Assessment”
By Morgan Rehnberg

EDITORS' HIGHLIGHTS
AGU Advances
“Eminently Complex – Climate Science and the 2021 Nobel Prize”
By Ana Barros

EDITORS' VOX
Perspectives of Earth and Space Scientists
“New Directions for Perspectives of Earth and Space Scientists”
By Michael Wysession


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