Thanks Fractal Trader. Before anyone gets cranky with me, no, I don't think Earth's life started on Mars, and have for some time regarded this idea as a transparent ploy to push for manned missions to Mars. Robotic exploration of the Martian surface is definitely the way to go for the foreseeable, and I'm 100 percent in favor of those. Furthermore, people who want to settle on Mars should be allowed to, but after they run into the inevitable problems, they should be allowed to die there in whatever way they see fit. I suggest we send the Moslems, they're used to living in deserts of their own creation.