Quote Originally Posted by King of Atlantis
depends on what you consider aliens. I believe they found dead bacteria on a rock that came from mars.
i've actually looked at ALH84001, the putative 'bacteria' are quite unconvincing. i think it's certainly possible that mars once harbored life, but i don't think we have any evidence for that. the only thing the theory really has going for it is that the shape and size of some of the supposed fossils are similar to earth nanobacteria. by itself, that's not much.

personally, i have no information upon which to base an assumption about aliens. an "i don't know" from me as well.