Integral interview to Dr. Gilbert Levin http://www.gillevin.com/mars.htm ), creator and responsible of the LR experiment on board of the Viking missions in 1976, while he illustrates how life has already been discovered on Mars through the marked release experiment designed by himself.
A very important piece for those who want to understand the research of life on Mars in all its facets, at least from the point of view of those who have designed and supervised the experiments in the first person.
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