Viking Mars Soil Tests May Have Destroyed Microbes, Researchers Suggest
Fifty years after NASA’s Viking landers touched down on Mars, astrobiologists are revisiting whether the 1976 missions inadvertently destroyed the very extraterrestrial microbes they were sent to find. Researchers suggest that flooding dry Martian soil samples with water during metabolic tests may have overwhelmed organisms adapted to extreme aridity. On July 20, 1976, the Viking … Read more