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Discovery of "Arsenic-bug" Expands Definition of Life

Subject: Discovery of "Arsenic-bug" Expands Definition of Life
From: NASA Science News <snglist@xxxxxxxxxxxxxxxxxxx>
Date: Thu, 02 Dec 2010 14:11:19 -0500

NASA Science News for Dec. 2, 2010

Astrobiologists have discovered the first known microorganism on Earth able to thrive and reproduce using the toxic chemical arsenic. The microorganism, which lives in California's Mono Lake, substitutes arsenic for phosphorus in the backbone of its DNA.

FULL STORY at

http://science.nasa.gov/science-news/science-at-nasa/2010/02dec_monolake/

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