"The Earth destroys its fools, but the intelligent destroy the Earth." -Khalid ibn al-Walid Usually, when we talk about terraforming, we think about taking a presently uninhabitable planet and making it suitable for terrestrial life. This means taking a world without an oxygen-rich atmosphere, with watery oceans, and without the means to sustain them, and to transform it into an Earth-like world. The obvious choice, when it comes to our Solar System, is Mars.