Which NASA missions conducted experiments in the mid-1970s searching for active metabolism in Martian soil?

Answer

Viking landers

The Viking landers, launched in the mid-1970s, performed experiments specifically designed to detect active metabolic processes within the Martian soil.

Which NASA missions conducted experiments in the mid-1970s searching for active metabolism in Martian soil?

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Signs of Life on Mars? NASA's Discovery, Explained | NOVA | PBS

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