How We Will Terraform Mars

NASA's latest Mars rover, Curiosity, is currently its way to Mars, on a mission to explore whether life could exist there. If we're going to colonize Mars — and some scientists say we must — it's likely that we'll start by terraforming. Terraforming, or planetary engineering, is the process of altering the climate of… » 12/19/11 1:35pm 12/19/11 1:35pm