Uploaded April 2025 | Updated September 2026, 3 weeks ago
In a recent study, Dr. Janice Bishop of the SETI Institute, along with postdoctoral researcher Adomas Valantinas from Brown University, propose that Mars' characteristic red hue is primarily due to ferrihydrite—a water-rich iron oxide mineral—rather than the previously assumed hematite. Analyses of data collected by Martian orbiters, rovers, and laboratory experiments showed that ferrihydrite closely matches the composition of the dust covering Mars' surface.
Ferrihydrite typically forms in environments abundant in cool water, suggesting Mars once had significant liquid water on its surface. The research implies that Mars transitioned from a wet to a dry environment billions of years ago. Confirming these findings would require returning samples from Mars to Earth for comprehensive analysis.
Join planetary scientist Beth Johnson for a chat with Dr. Bishop about the evidence for ferrihydrite and what it could have meant for life on Mars.
Paper: nature.com/articles/s41467-025-56970-z
#mars #redplanet #space #science #planetaryscience #mineralogy
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In a recent study, Dr. Janice Bishop of the SETI Institute, along with postdoctoral researcher Adomas Valantinas from Brown University, propose that Mars' characteristic red hue is primarily due to ferrihydrite—a water-rich iron oxide mineral—rather than the previously assumed hematite. Analyses of data collected by Martian orbiters, rovers, and laboratory experiments showed that ferrihydrite closely matches the composition of the dust covering Mars' surface.
Ferrihydrite typically forms in environments abundant in cool water, suggesting Mars once had significant liquid water on its surface. The research implies that Mars transitioned from a wet to a dry environment billions of years ago. Confirming these findings would require returning samples from Mars to Earth for comprehensive analysis.
Join planetary scientist Beth Johnson for a chat with Dr. Bishop about the evidence for ferrihydrite and what it could have meant for life on Mars.
Paper: nature.com/articles/s41467-025-56970-z
#mars #redplanet #space #science #planetaryscience #mineralogy
If you like science, support the SETI Institute! We're a non-profit research institution whose focus is understanding the nature and origins of life in the universe. Donate here: seti.org/donate
Learn more about the SETI Institute and stay up-to-date on awesome science:
- Subscribe to our YouTube channel at youtube.com/c/SETIInstitute
- Watch our streams over on Twitch at twitch.tv/setiinstitute
- Listen to our podcast, Big Picture Science [http://www.bigpicturescience.org](http://www.bigpicturescience.org/)/
- Subscribe to our newsletter seti.org/signup
- Buy merchandise from Chop Shop chopshopstore.com/collections/seti-institute/SETI
Don't forget to like and subscribe! Ring the bell for notifications of when we go live.
