Did NASA’s experiment accidentally kill life on Mars?
life on Mars during the Viking missions in the 1970s, according to Dirk Schulze-Makuch, an astrobiologist at Technische Universität Berlin in Germany.
In 1976, NASA's Viking 1 mission deployed two spacecraft to the Martian surface to to investigate the Red Planet and search for signs of life. These experiments involved mixing water and nutrients with soil samples collected from Mars, based on the assumption that life would require liquid water to survive—similar to life on Earth.
Initial results hinted at the possibility of life, but after decades of debate, most researchers concluded that the findings were likely false positives.
Now, Schulze-Makuch has proposed a radical theory that the Viking landers may have indeed encountered Martian life, but inadvertently destroyed it by overwhelming it with water.
In a commentary for Nature, Schulze-Makuch wrote that potential Martian life might survive in hyperarid conditions by relying on salts to draw moisture from the atmosphere—similar to microbes found in extreme environments like Chile’s Atacama Desert. “The experiments performed by NASA’s Viking landers may have accidentally killed Martian life by applying too much water,” he explained.
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