Here is an interesting article saying they have found evidence of water on Mars, which is the main prerequisite for colonization.

http://sciencedude.ocregister....wing-on-mars/134225/

Good, let's go!

Okay, I'll go pack! Seriously, I saw someone famous in the space program, I can't remember his name, talking about their plans for the colonization of Mars, including terraforming. If they could find enough water, they could grow trees and plants, which would then eventually create a breathable atmosphere similar to Earth. It was fascinating, and it made me wish I had been born later, I would love to go to Mars!

We should've been there by now.