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unsolved mysteries

An image of a dark brown sphere and its rings is backlit against a black background. The closer rings glow in yellow-orange and are haloed by the dusty ring system in blue-white. Several bright specks are visible.
Posted inENGAGE, News

Saturn’s Shiny Rings May Be Pretty Young

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 9 June 20239 June 2023

The rings are fairly shiny despite being bombarded by dust, indicating that they haven’t been around for very long.

Small waves crashing on the coast with a city skyline in the background.
Posted inNews

Supersized Potholes Discovered off South African Coast

by J. Besl 8 June 20238 June 2023

Curious circular pits off South Africa’s Eastern Cape coast are larger than any similar feature previously recorded. Their origin remains a morphological mystery.

Mount Vesuvius looms over the Gulf of Naples.
Posted inNews

Ancient Victims of Vesuvius May Have Baked in a Cloud of Ash

by Carolyn Wilke 7 June 20237 June 2023

Debate still swirls around what killed ancient Romans during the 79 CE eruption. A study of wood charred by the event suggests a brief, but searing, flow of volcanic gas and debris.

A close-up of a smooth gray semispherical body in space with a red spherical body in the background
Posted inNews

Tiny Martian Moon May Be a Chip Off the Old Block

Javier Barbuzano, Science Writer by Javier Barbuzano 2 June 20232 June 2023

A close approach to Deimos reveals that its surface does not look like that of an asteroid, hinting at a Martian origin.

This illustration depicts a planet with blue clouds with several lightning storms. The Sun is faint in the distance. The band of the Milky Way and small pinpoints of stars fill the background.
Posted inNews

A Mission to Uranus Could Help Find Planet 9

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 22 May 202322 May 2023

Narrowing down the search is essential for gaining time on a high-powered telescope that could spot the hypothesized planet directly.

An aerial photograph of a remote, forested lake surrounded by forest.
Posted inFeatures

Hunting for Methane Hot Spots at the Top of the World

Jenessa Duncombe, Staff Writer by Jenessa Duncombe 26 April 202326 April 2023

A visit to an Alaskan wetland with some of the world’s highest lake marsh methane emissions brings scientists one step closer to understanding the phenomenon.

A circular cloud of black and blue dust shadows a small white star.
Posted inNews

Molten Meteorites Didn’t Deliver Earth’s Water

by Caroline Hasler 25 April 202325 April 2023

A new study has ruled out large, once-molten meteorites called achondrites as sources of Earth’s water.

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.

Una ilustración mostrando a la Tierra en el espacio con una sección que deja ver sus capas internas en colores rojos y naranjas brillantes.
Posted inResearch Spotlights

El hierro está en el centro de este debate de las ciencias de la Tierra

Aaron Sidder, freelance science writer by Aaron Sidder 6 April 20236 April 2023

Un nuevo estudio investiga el estado del hierro en el interior del planeta. Los hallazgos tienen repercusiones para comprender la estructura del núcleo interno.

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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

Carbon-Rich Rocks May Have Cooled the Ancient Martian Atmosphere

28 May 202628 May 2026
Editors' Highlights

From Grains to Bands: Modeling Deformation in Porous Rocks

26 May 202621 May 2026
Editors' Vox

From Volcanic Vents to Safer Skies

27 May 202627 May 2026
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