Originally Posted by starman2003
The Viking results were controversial, and haven't been generally considered proof of life owing to failure to find any organic compounds--"wiped out by pervasive oxidants."
Yeah, I read every report I could get back then. It was very exciting, and I got the bicentennial at the same time. Yay!
The same absolutist criteria did not find water in Moon rocks either, but we know that they missed it. They reported water, and the current then-theory rejected it, just couldn't be, so they shelved the report.
I think the universe is teaming with life because the same chemistry exists everywhere and it creates life spontaneously. Usually deep below the surface. Surface life is what is uncommon and needs very specific conditions. Even Earth doesn't always sustain surface life.