Professor Joseph Miller, a NASA scientist that has been working with NASA’s space program for the past 30 years (so this guy knows what he’s talking about) has come to the conclusion that there is over a 95% chance of microbial life existing in large quantities over the surface of the red planet.
The video below has Professor Joseph Miller speech about the possibility of life on mars, amongst other things. The video even takes a look at some evidence that points at the chance of small insects roaming around on the planet at certain times of the year. The description and the video (both created by the truthloader Youtube channel) have been posted below.