[rs79bm]

I should have made it more clear. Mars atmosphere, in one point of it's history, was very similiar to that of earth. Identical was to strong a word, I suppose. Having said that, Mars lost a lot of its atmosphere and you would certainly need a spacesuit on the surface of mars to survive any longer than a few seconds.

[Analyzing Inconsistencies]

Mars has lost most of its atmosphere...I think it has at most 1% of our own, but I've not read the facts for a couple of years. Even so, Mars has almost 20% of our gravity.