VIking 1 did find evidence of extraterrestrial microbes in soil samples from the Red Planet.
Mathematical analysis of the samples concluded that salts in the soil on Mars 'threw off' initial estimates - and that the soil samples show strong evidence of microbial life.
The new analysis looked for 'complexity' in the samples - an indication of life. To the surprise of the scientists, they found it .... Read more at http://tinyurl.com