Ancient Mars may have had an environment capable of harboring an underground world teeming with microscopic organisms. But if they existed, these simple life forms would have altered the atmosphere so profoundly that they triggered a Martian Ice Age.
Early Mars’ presumably moist, warm climate, however, would have been jeopardized by so much hydrogen sucked out of the thin, carbon dioxide-rich atmosphere, Sauterey said. As temperatures plunged by nearly minus-400 degrees Fahrenheit , any organisms at or near the surface likely would have buried deeper in an attempt to survive.
The SETI Institute’s Kaveh Pahlevan said future models of Mars’ climate need to consider the French research. “What their study makes clear, however, is that if life were present on Mars” during this earlier period, “they would have had a major influence on the prevailing climate,” he added in an email.
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Ancient Mars microbes triggered climate change that made it hard for them to surviveTereza is a London-based science and technology journalist, aspiring fiction writer and amateur gymnast. Originally from Prague, the Czech Republic, she spent the first seven years of her career working as a reporter, script-writer and presenter for various TV programmes of the Czech Public Service Television. She later took a career break to pursue further education and added a Master's in Science from the International Space University, France, to her Bachelor's in Journalism and Master's in Cultural Anthropology from Prague's Charles University. She worked as a reporter at the Engineering and Technology magazine, freelanced for a range of publications including Live Science, Space.com, Professional Engineering, Via Satellite and Space News and served as a maternity cover science editor at the European Space Agency.
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