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unsolved mysteries

Researchers track carbon dioxide trends in the Southern Ocean to better understand one of the world’s largest carbon sinks
Posted inResearch Spotlights

Shedding Light on the Southern Ocean Carbon Sink

by S. Witman 22 February 201817 August 2022

One of the world’s largest carbon sinks is still poorly understood.

Michael DeLucia standing in front of the Great Unconformity
Posted inNews

Erasing a Billion Years of Geologic Time Across the Globe

Lucas Joel by L. Joel 5 February 201823 February 2023

The Great Unconformity—a huge time gap in the rock record—may have been triggered by the uplift of an ancient supercontinent, say researchers using a novel method for dating rocks.

Researchers review how comprehensive climate observations could improve life on Earth.
Posted inResearch Spotlights

Reckoning with Climate’s Most Challenging Questions

by S. Witman 23 January 201831 January 2022

Climate researchers outline a vision for the future of climate observations.

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.

Utah Lake carp removal
Posted inNews

Modern Chemicals from Mystery Source Taint Fish in Utah Lake

by S. Montanari 21 December 201718 March 2022

Utah Lake’s fish contain high levels of a potential carcinogen. Could removing some bottom-feeders reduce this contamination?

Researchers use radiometric dating to distinguish the timing of one of Earth’s most pivotal timescale boundaries.
Posted inResearch Spotlights

Resolving a Mystery of the Ages

by Terri Cook 29 November 20174 May 2022

High-precision radiometric dates shed new light on the puzzling 600,000-year disparity in the timing of one of Earth’s most pivotal timescale boundaries.

Spencer Canyon landslide tied to earthquake
Posted inNews

Mystery Quakes May Be Among World’s Longest-Lived Aftershocks

Ilima Loomis, Science Writer by Ilima Loomis 16 November 20175 January 2022

New evidence about where a major earthquake struck central Washington State 145 years ago raises the possibility that today’s unusually frequent quakes in the area still echo that 1872 event.

Fossil of an Ediacaran creature
Posted inFeatures

Hunting Rare Fossils of the Ediacaran

JoAnna Wendel, freelance science writer and illustrator by JoAnna Wendel 13 November 201730 January 2023

The search for fossil imprints and casts of squishy organisms takes time, perseverance, and sometimes a sprinkle of luck.

New research seeks to uncover the primary mechanism behind the Atlantic Multidecadal Oscillation
Posted inResearch Spotlights

Ocean Dynamics May Drive North Atlantic Temperature Anomalies

Sarah Stanley, Science Writer by Sarah Stanley 9 October 20173 February 2023

A new analysis of sea surface temperature and salinity over several decades seeks to settle the debate on which of two mechanisms underlies the Atlantic Multidecadal Oscillation.

Saturn’s largest moon Titan, viewed by Cassini.
Posted inNews

VIDEO: The Weird, Wonderful Science Behind Titan’s Atmosphere

JoAnna Wendel, freelance science writer and illustrator by JoAnna Wendel 13 September 201731 October 2022

Scientists are baffled by a spacecraft’s detection of large molecules in a moon’s atmosphere.

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Features from AGU Publications

Research Spotlights

Machine Learning Simulates 1,000 Years of Climate

27 August 202527 August 2025
Editors' Highlights

As Simple as Possible: The Importance of Idealized Climate Models

28 August 202526 August 2025
Editors' Vox

Waterworks on Tree Stems: The Wonders of Stemflow

21 August 202520 August 2025
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