No life with arsenic?

 

On 2 December 2010, NASA announced that a study it was financing demonstrated that GFAJ-1 bacteria used arsenic (normally a poison) to live and reproduce. NASA said at the time that “the definition of life has just expanded” (see this article). This discovery has now been brought into question by two scientific articles published in the prestigious Science review, the same one that also accepted the paper claiming the use of arsenic by the GFAJ-1 bacteria.

Published on 10 July 2012

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