Evidence of Martian Microbes May Have Been Accidentally Killed in 1976 Viking Experiments

Answer
According to recent research, it is possible that evidence of Martian microbes may have been accidentally killed during experiments carried out by NASA's Viking landers in 1976. The Viking experiments involved adding water to soil samples, which may have overwhelmed any potential microbes, leading to their demise. The labelled release experiment, which sought to detect and monitor ongoing metabolism, returned positive results that signaled the detection of microbial respiration on Mars. However, the interpretation of the data is still debated. Despite the lack of conclusive evidence, some researchers believe that the Viking experiments may have inadvertently killed Martian microbes, making it difficult to determine if there is or ever was life on Mars.
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