Are We Infecting Mars With Our Germs?
Before any mission to Mars launches, NASA's scientists and engineers put every tiny component of the robot through rigorous sterilization procedures, ensuring the lander or rover is bacteria-free. This isn't because NASA has an extreme case of obsessive compulsive disorder, it's because they want to keep the Martian surface as pristine from Earth Brandâ„¢ bugs as possible.
http://news.discovery.com/space/are-...our-germs.html
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