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unsolved mysteries

Visualization of a methane plume in Mars’ atmosphere during the northern summer season as retrieved from NASA's Infrared Telescope Facility at Mauna Kea, Hawaii.
Posted inEditors' Vox

The Mystery of Methane on Mars Thickens

by Germán Martinez, Anni Määttänen and David Baratoux 15 February 20223 January 2023

Two recently published papers zoom in on the mystery source of methane in the Martian atmosphere.

A Eurasian reed warbler carrying an insect in its beak
Posted inNews

Magnetic Stop Signs Show Birds the Way Home

Jenessa Duncombe, Staff Writer by Jenessa Duncombe 14 February 202214 February 2022

Just like salmon and sea turtles, these songbirds appear to be sensitive to shifts in the magnetic field.

A large iceberg floats amid a field of sea ice.
Posted inScience Updates

New Perspectives on the Enigma of Expanding Antarctic Sea Ice

by Edward Blanchard-Wrigglesworth, Ian Eisenman, Sally Zhang, Shantong Sun and Aaron Donohoe 11 February 2022

Recent research offers new insights on Antarctic sea ice, which, despite global warming, has increased in overall extent over the past 40 years.

Yatteyattah Nature Reserve in Australia
Posted inNews

A New Model for an Old Extinction Event

by Robin Donovan 8 February 20228 February 2022

A 3D Earth system model incorporates variables such as temperature and sulfurization to shed light on the end-Permian extinction event.

A beach at As Sifah, Oman
Posted inResearch Spotlights

Radiometric Dating Sheds Light on Tectonic Debate

Aaron Sidder, freelance science writer by Aaron Sidder 21 January 20222 February 2022

The emplacement of the Samail Ophiolite in Oman has been a source of disagreement among geologists. New state-of-the-art research offers a fresh perspective on its timing and geometry.

The Atacama Desert, Chile
Posted inResearch Spotlights

Understanding Rare Rain Events in the Driest Desert on Earth

by Emily Cerf 18 January 202218 January 2022

A new study reveals the atmospheric paths of storm events that can deliver a decade’s worth of rain in a few hours to the Atacama Desert.

An artist’s rendering of early Earth with a huge Moon looking over the alien landscape, including oceans of water
Posted inNews

How Much Did the Moon Heat Young Earth?

by Jure Japelj 11 January 202211 January 2022

Tidal heating may have raised the surface temperature of early Earth and triggered global volcanism, a new study says.

Gyldenlove Glacier discharges into a fjord in southern Greenland.
Posted inNews

“Sticky” Ice Sheets May Have Led to More Intense Glacial Cycles

by Clara Chaisson 5 January 20222 July 2024

New research attributes a shift to longer, stronger glacial cycles to increased friction between ice sheets and bedrock in the Northern Hemisphere 1 million years ago.

Photo of a scientific raft used to extract sediment cores from Caldeirao Lake on Corvo Island, Azores.
Posted inNews

Sediments Suggest Vikings May Have Been the First to Settle the Azores

by Santiago Flórez 4 January 20224 October 2022

A multidisciplinary team studying lake sediments and climate change found evidence that the archipelago was inhabited 700 years earlier than historical sources claim.

Satellite view of frosty sand dunes on Mars
Posted inScience Updates

Planetary Dunes Tell of Otherworldly Winds

by Timothy Titus, Serina Diniega, Lori K. Fenton, Lynn Neakrase and James Zimbelman 22 December 202116 February 2022

On Earth and throughout our solar system, ripples and dunes in sand and dust offer insights into how winds blow, liquid currents flow, and solid particles fly and bounce over the terrain.

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Features from AGU Publications

Research Spotlights

More Bubbles Means More Variation in Ocean Carbon Storage

8 July 20258 July 2025
Editors' Highlights

Scientists Face Limitations Accessing Seafloor Information

9 July 20258 July 2025
Editors' Vox

Water Tracks: The Veins of Thawing Landscapes

25 June 202525 June 2025
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