With the recent findings of seasonal methane blooms on Mars and now unusual readings of unexplained oxygen levels, the question of “is there microbiological life on the red planet?” goes unanswered. In 1976, NASA sent Viking 1 and Viking 2 with four types of biological experiments. Of these experiments, the Labeled Release Experiment returned positive results on both landers, however the control tests could not confirm the results. Did the Viking landers find life on Mars?
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