๐ฝ Viking mission's Martian soil test sparks life debate
In 1976, NASA tested Martian soil using the Viking landers' biology labs. The Labeled Release experiment involved feeding soil radioactive organic nutrients to check for signs of metabolism. Researchers observed a radioactive gas evolution at both landing sites, which was reduced by heat treatment. This looked like a biological process but was not definitively confirmed by other experiments. Ultimately, scientists couldn't separate the signal from Mars' unique chemistry. ๐ฝ