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unsolved mysteries

Drillers in hardhats work on the rig floor of a research vessel.
Posted inNews

Getting to the Bottom of Slow-Motion Earthquakes

Adityarup Chakravorty, freelance science writer by Adityarup Chakravorty 24 April 20202 December 2022

For close to 20 years, slow-motion earthquakes have been an enigma. Core samples provide new clues to their origins.

Abstract splash of white plasma on a black background
Posted inAGU News

Edmond Dewan, Citizen Science, and the Mystery of Ball Lightning

Rachel Fritts, Science Writer by Rachel Fritts 19 February 202029 September 2021

In the early 1960s, a physicist enlisted the help of the public to study a rare atmospheric phenomenon.

Rock leaves a trail on a cracked, dry lake bed.
Posted inNews

Does This Fossil Reveal a Jurassic Tropical Freeze?

by H. Leifert 19 February 202027 January 2023

On view for over a century, a fossil slab may display evidence of tropical freezing during the Jurassic, but scientists never noticed it—until one finally did. Some colleagues are not convinced.

College students smile with open and closed boxes with tech equipment, labeled HELEN
Posted inNews

Students Launch Balloon-Borne Payloads into Thunderstorms

Katherine Kornei, Science Writer by Katherine Kornei 28 January 202019 January 2023

The High Energy Lightning Emission Network project hopes to detect elusive bursts of light and particles called terrestrial gamma ray flashes.

Ethan Baxter examining garnet samples on an island cliff in Sifnos, Greece
Posted inNews

Using Garnets to Explore Arc Magma Oxidation

Rachel Crowell, Science Writer by Rachel Crowell 26 November 20195 October 2022

Samples collected from Greece help researchers piece together a scientific puzzle.

The Curiosity rover sits on the surface of Mars on 12 May 2019.
Posted inResearch Spotlights

Curiosity Rover Reveals Oxygen Mystery in Martian Atmosphere

Sarah Stanley, Science Writer by Sarah Stanley 25 November 201924 April 2024

An air-sampling study has captured long-term trends in the concentrations of five key atmospheric gases for the first time.

Jupiter’s aurora captured by the Hubble Space Telescope
Posted inNews

Computers Tease Out Secrets of Jupiter’s Aurorae

Nola Taylor Redd, Science Writer by Nola Taylor Tillman 21 November 201910 February 2023

Aurorae once classified by human eyes are now being sorted by machines. The change may help astronomers understand how the mysterious features are powered.

NASA’s Mars Atmosphere and Volatile Evolution spacecraft orbits Mars and samples electrons behind the Martian bow shock in this artist’s rendition.
Posted inResearch Spotlights

Explaining the Missing Energy in Mars’s Electrons

by Mark Zastrow 11 November 201910 March 2022

Electrons energized and trapped at Mars were thought to lose energy inside the planet’s magnetosheath, but new research suggests a different explanation of spacecraft data.

A puddle of oil lays on sand on a beach
Posted inNews

Brazil’s Oil Spill Is a Mystery, so Scientists Try Oil Forensics

Jenessa Duncombe, Staff Writer by Jenessa Duncombe 24 October 201930 January 2024

Thousands of barrels of oil have been tarring Brazil’s beaches since September, and no one knows why. An oil spill scientist is running oil forensics to find out.

An illustration of the Sun within the heliosheath encountering the interstellar medium
Posted inNews

What Inflates the Solar Bubble? Voyagers Count What’s Missing

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 17 October 201916 November 2021

The first in situ measurement of the pressure at the edge of the solar system reveals that there’s still a lot we don’t know about what sets the size of the heliosphere.

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Research Spotlights

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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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