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Microbes May Be Hearty Enough for Interplanetary Travel

Forget little green Martians invading Earth. Scientists are now concerned bacteria from Earth may be hitching rides to Mars on the many probes that have landed on the Red Planet. According to NASA, the invading organisms "have the potential to contaminate other celestial bodies, making it difficult for scientists to determine whether a life form existed on another planet or was introduced there by explorers." In order to reduce the potential of contamination, scientists say...

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