[AnotherUnixGeek]

Why NASA still believes we might find life on Mars

I think there's a good chance that if life is found on Mars, it will be some bacterial contamination from an Earth rover or probe.

[Cementjungle]

I think there's a good chance that if life is found on Mars, it will be some bacterial contamination from an Earth rover or probe.

I agree.

I think that if there ever was life on Mars we would have found something by now. On Earth, you couldn't find anyplace at all to land a rover, have it examine soil and rocks and not find signs of both current and past life.

If there ever was life on Mars, there should be evidence in every scoop of sand. I think we've had several instruments there to do all sorts of stuff for quite some time now, and nothing... zilch... not a single bacteria corpse.

But... we are introducing things from Earth there, so who knows.... perhaps in a couple billion years they could evolve to produce a Justin Bieber.