Martian Gullies Rewritten: CO2 Ice, Not Water, Likely Carved the Terrain
TL;DR
A new arXiv preprint analyzing Mars Express and MRO data suggests Martian gullies aren’t carved by liquid water—and CO2 geysers aren’t the culprit either. The authors favor CO2-ice–driven sublimation or avalanche-like flows during the late stages of seasonal ice loss, based on a lack of spectral water signals and a timing mismatch with geyser activity, though the work remains a preprint not yet peer-reviewed.
Topics:sciencespace-and-spaceflight#co2-ice#gullies#mars#mars-express#mars-reconnaissance-orbiter#space-and-spaceflight
- Scientists Thought Ancient Water Carved Martian Gullies. New Analysis Says Otherwise Gizmodo
- What's carving active gullies on Mars? It's not water Phys.org
- Mars: Gullies Carved by Dry Ice, Not Water srpske.rs
- Scientists Discover Why Mars Has Earth-Like Gullies Without a Single Drop of Liquid Water The Daily Galaxy
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