may have discovered life on Mars 50 years ago when it first put its two Viking landers on the Red Planet, but the agency may have also accidentally killed it.The claims were made by Dirk Schulze-Makuch from the Technical University , who believes an experiment carried out in the 1970s that added water to the soil drowned any life lurking in the Martian landscape.The test, , initially returned positive for metabolism, but a related investigation found no trace of organic material.
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