What do you think is really on mars?

Aliens with acid and all cool things which can kill us :) honestly I have no idea..

ummm i dont knw....!!! i ll tell you when i go there.... they say....vacations/trips on mars and the moon are the next big thing thats goin to happen soon....!! so well....i ll make sure i get the advance booking done!! lol

I think it's just rock formations; and I don't think there are really any canals there, either. The scientist who first noted them used the word 'canali', which can mean either canal or channel. It was apparently the second meaning which he intended; it was just misunderstood by people who translated the writings, and now there are conspiracy theories about aliens having (or having had) a settlement on Mars.