Not yet.
We have not yet found any evidence of life on Mars, let alone footprints.
No. There is no evidence of any life of Mars, certainly not multicellular life.
There is no scientific evidence to suggest that aliens live on Mars or any other planet. The search for extraterrestrial life is ongoing, but as of now, we have not found any conclusive proof of alien existence.
No. Humans only live on Earth. There is likely no life at all on Mars.
No, as of yet there is no evidence of any life existing on Mars but they are still looking.
As of today, we are saying that there is no life on mars. But then again [I don't think] humans have actually landed on Mars [the atmosphere would burn you to a crisp], so we can't say for sure. But no definite evidence of life has been found on ANY planet in the Solar System.
NASA has not discovered microbial fossils on Mars. NASA's Curiosity rover has not found any direct evidence of current or past life on Mars. The search for signs of past life on Mars continues with future missions like the Mars 2020 rover.
There is no evidence of any form of life on Mars. Scientists are exploring the possibility of past microbial life on Mars, but as of now, there is no definitive proof of any life forms existing on the planet.
There probably was life on Mars, since evidence of water was discovered on the planet. However, there is no certainty that there was ever any life on Mars or other planets in our Solar System.
No. Scientists have discovered fossil evidence that mightindicate that there were, at one time long ago, bacteria on Mars. However, the evidence is sketchy; not all scientists agree that the fossils are in fact evidence of life.
There are no animals on Mars. It is void of any life.
There is currently no credible evidence to suggest the presence of aliens or any form of life on Mars. The scientific consensus is that Mars is not inhabited by aliens or any other form of extraterrestrial life.