live on Mars?

You mean "Do you think human can live on Mars?"
I think now days' technology is not good enough to make water combination, make atmosphere and the air pressure in space. However, maybe in the future it may happen because of the development of technology. If human move to Mars, then human will get change by the surroundings, maybe the DNA will change too, cause living in a total different planet.

No,we can't .It is because we can't sure is there any aliens.Besides,it's environment is very different from earth.There are less oxygen too.It is also difficult to travel to there too.