Arsenic-Based Life Found on Earth

Astrobiologists: Deadly arsenic breathes life into organisms, Arizona State University

"Evidence that the toxic element arsenic can replace the essential nutrient phosphorus in biomolecules of a naturally occurring bacterium expands the scope of the search for life beyond Earth, according to Arizona State University scientists who are part of a NASA-funded research team reporting findings in the Dec. 2 online Science Express."

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