1.Do you think it's possible that humans will colonize the other planets in the outer space in the future? 2. Why do you think so much investment has been made to conquer the outer space

Possible, maybe but in my guess it will not be done. We may send some early space pioneers out to Mars but I hope we will not leave them there. Just like Earth gravity we are fooled about our free air, water and heat. We breathe the air and drink the water and then put our waste right back into it. At least we could do better about killing the future food that lives in some of this stuff.

Mars does not have free heat, air, water and free food. I wish Mars had aborigines and then we might find out how to live with nothing. Mars rocks must be their animals and plants. The rocks seem to like the climate and food there.

We cannot within our lifetimes find a new SUN with nice planets with life already and all the things that Earth used to supply to us. I say used to supply because that free food, water and air will one day run out or be not usable. Where we gonna get food air water heating oil from? May as well be on a desert planet.