Template:POTD/2007-11-14
Artist's conception of the terraforming of Mars in four stages of development. Terraforming is the hypothetical process of changing a planet's environment to produce a world that is habitable by humans. The globe in the final stage (on the right) is based on data from the Mars Global Surveyor. All the shore lines are approximate to where it is believed they would be if all the permafrost on Mars melted.Image credit: Daein Ballard