Viking found life on Mars

I've heard this on and off for decades, and I've never seen any proof. The general consensus is they found nothing, however there has been the argument that the lander itself contaminated the landing site, which may have rendered the results wonky. This is possible. It's also worth noting the biological experiments were VERY primitive, and pretty much consisted of pouring one kind of chemical on some soil, and watching the results. Getting anything out of that was a hail mary pass.

I would point out that there have been five landers in the years since, and none have found anything. Five negatives and one "probably not" equals six negatives.