Following ancient rain toward life-related chemistry clues on Mars
Researchers have created a global map identifying where atmospheric formaldehyde may have been delivered on early Mars between 3.8 and 3.6 billion years ago. This study helps pinpoint potential locations where life-related chemical reactions could have occurred.
Why it matters
Identifying regions on Mars that could have supported prebiotic chemistry is essential for future astrobiology missions and the search for extraterrestrial life.
edited by Swati Mestri , reviewed by Robert Egan
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Add as preferred source Modeled global distribution of annual atmospheric formaldehyde (H₂CO) delivery to the surface of early Mars, overlaid on present-day topography with rover landing sites. Darker colors indicate higher delivery. Credit: Shungo Koyama et al. The Mars we know today is a cold, dry world of dust and rocks. However, around 3.8–3.6 billion years ago, it may have looked very different. Geological and mineral evidence suggests that, in its distant past, the planet experienced periods warm and wet enough for water to exist on its surface, potentially forming rivers, lakes and even an ocean in the northern hemisphere.
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