Life on Mars?

Just wanted to share with you this link to the Boston Globe's picture blog, called The Big Picture.
Specifically, to this breathtaking collection of pictures from Mars.

I'm just amazed by how far we have come. The facts that the latest Mars Rover (Phoenix) found ice on Mars (meaning water, or at least a liquid), and that the surface temperatures it reports revolve around -21F (-29C) (human livable temperatures - ask anyone who lives in Montreal or Wisconsin), lead me to believe Mars can one day be colonized. Now if we could just solve this tiny lack of breathable atmosphere problem...