This scanning electron micrograph shows a strain of the arsenic-eating bacterium called GFAJ-1. CREDIT: Science/AAAS.Debate Reignited Over Claim of Arsenic-Based Life -- Live Science
One of the more heated scientific debates of recent years has been stirred up again with the publication of new criticisms of the reported finding of "arsenic life."
The prestigious journal Science published the criticisms today (May 27) along with a defense of the study, which Science had posted online this past December.
A team of researchers led by Felisa Wolfe-Simon of NASA's Astrobiology Institute had studied bacteria collected from California's Mono Lake and reported finding evidence that these microorganisms were substituting the poisonous molecule arsenic for the phosphorous usually used to build DNA.
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