what the scientists say.
physicist nathaniel mortimer has this to say: "we agree that life can exist under different conditions from the ones we know about. and we now believe that there might have been some from of life on mars billions of years ago, maybe deep underground. personally, i think if we knew where to look, we would find life on mars today. but as for humans going to live on mars? well, first of all we have to figure out some problems. then ... who knows?