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An international team of scientists has found that Mars may have maintained life-friendly conditions far longer than previously believed. By analyzing data from the Curiosity rover and comparing it with similar geological formations in the deserts of the UAE, researchers discovered evidence suggesting extended wet conditions on the planet.
Previously, scientists agreed that Mars once had water and a denser atmosphere, but the exact duration when the planet could support life was unclear. Water was thought to have disappeared around 4.2–3.7 billion years ago due to gradual atmospheric loss from solar wind, after which Mars quickly became inhospitable.
Led by Dimitri Athri from New York University’s Center for Astrophysics and Space Science in Abu Dhabi, the team studied ancient sand dunes in the Stimson formation of Gale Crater. Curiosity repeatedly observed lithification there—the process of sand turning into rock under the influence of water. Comparing Mars’ formations with UAE dunes formed in wet conditions, the scientists concluded that Gale Crater dunes interacted with groundwater from nearby mountains, forming minerals like gypsum, a key indicator of prolonged water presence.
These findings align with previous research by Athri and Vignesh Krishnamurti presented at the International Mars Conference. On Earth, similar dune systems often preserve traces of ancient life, including microorganisms. Therefore, Gale Crater may hold potential Martian biosignatures. The study provides insights into Mars’ climatic evolution and highlights promising targets for future missions.
