Mars Doesn’t Need Earth Goop Wired News

When Mir splashed down almost two weeks ago, many scientists were concerned that fungal spores that had developed on the inside of the space station would contaminate Earth’s environment with some kind of primordial space goop, introducing an unknown life form. But what about contamination going the other direction? With the launch of Mars Odyssey on Saturday and a full slate of missions ready to launch for Mars this decade, what is being done to ensure that we don’t contaminate Mars with our own goop?