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Submission + - Earth Bacteria Hitch A Ride To The Stars

An anonymous reader writes: has an article on how old rocket stages are carrying bacteria from Earth to interstellar space. The four upper rocket stages were used to boost deep space probes Voyager 1, Voyager 2, Pioneer 10 and New Horizons. The spacecraft were sterilized, but the rocket stages were not, and they now carry the bacteria of the engineers who handled them. If the rocket stages hit a habitable planet, and the bacteria survive the journey, they would be able to reproduce and colonize the planet.

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