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"Scientists fear interplanetary contamination in new Mars missions." St Louis Post-Dispatch (MO). St. Louis Post-Dispatch. 2004. HighBeam Research. 5 Nov. 2012 <http://www.highbeam.com>.
"Scientists fear interplanetary contamination in new Mars missions." St Louis Post-Dispatch (MO). 2004. HighBeam Research. (November 5, 2012). http://www.highbeam.com/doc/1G1-125688298.html
"Scientists fear interplanetary contamination in new Mars missions." St Louis Post-Dispatch (MO). St. Louis Post-Dispatch. 2004. Retrieved November 05, 2012 from HighBeam Research: http://www.highbeam.com/doc/1G1-125688298.html
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Byline: Eli Kintisch
ST. LOUIS _ With new evidence that bacteria could live on Mars, a leading scientist is calling on NASA to improve procedures to prevent astronauts from bringing contamination back to Earth. If necessary, that could mean the astronauts would have to spend the rest of their lives on Mars, said Jeffrey Kargel, a geologist with the United States Geological Survey.
In the last year, evidence from NASA rovers has moved the idea of an ancient watery Mars from hypothesis to fact. That, in turn, has bolstered speculation of some sort of life on the red planet, in the past or even now.
Scientists must confront the possibility, however remote, that astronauts could bring martian bacteria back to Earth, Kargel said.
Kargel called for new standards of so-called "planetary …
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