I know plenty about Mars. The atmospheric pressure at the surface is 600 pascals; the water is almost entirely polar. This is not a habitable planet, as evidenc

I know plenty about Mars. The atmospheric pressure at the surface is 600 pascals; the water is almost entirely polar. This is not a habitable planet, as evidenced by the fact that it is totally devoid of life. Venus is even worse; it has a day longer than its orbital period. If your idea of a good life is floating above a pool of noxious gases, there are plenty of places on Earth you could accomplish the same for much less money and effort.