When can people live in MARs?

Well, Mars can already be considered as the second home yet, many things are still needed to discover. Mars is almost like Earth. There are traces of water found which could be under the surface. It is just like a desert planet as you can see. But the planet has features that can still prevent human habitation. Basically, it's the atmosphere. There's no oxygen in it. I just wonder why they still do not plant trees there... Probably the rocks may not be for vegetation. Do you know any news of human visitation in the planet? I guess only robots were sent. The weather and temperature may not be appropriate yet to humankind. Well to shorten up... it will took so long, a very very long time before it can be called a new EARTH.

lol =D Anytime!! As long as one is able to withstand the conditions on MARS, and they can be living there any moment!! lol =D Or rather, we are always living on mARS, because we are all MEN!! Man are from mArs, while woman are from VENUS!! Earth is just a meeting point for both sexes to reproduce offsprings!! haha

The scientist and astronaut have been explored the mars already. I think it is good 2nd home of humanity if the population get boom more.Mars is a good option to live provided that our technology develop more as oxygen to Mars. Space craft center must be build outside the earth.

i don't know.. i hope so though because someday earth will become unfit for life...

well, i believe that we could never live outside the earth.. earth is our only choice to live in.. so, make sure that you care about our only planet, the earth..