Life On Mars

— NPR's Christopher Joyce reports that new research may show that reports of life on Mars may were premature. Two papers in this week's issue of the journal Science suggest that signs of microscopic life on a 4.5 billion year old Martian rock may just be contamination from the Earth. The potato sized meteorite landed in Antarctica 13-thousand years ago and was found in 1984. Last year NASA scientists said it contained chemical compounds and tiny fossil shapes that could have been made by microbes on Mars.

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