Evidence of Microbe Life on Mars?

The PI on the Labeled Release Experiments on the two '70s Viking Mars probes discusses what they found in an article over at Scientific American.  Read and make up your own minds.  I will not comment here further, it's just not my field of expertise.  Still, interesting article, and worth your 15 minutes.

Related at Wikipedia:
https://en.wikipedia.org/wiki/Viking_lander_biological_experiments
https://en.wikipedia.org/wiki/Life_on_Mars