jul 142012
"Arsenic Life" Needs Phosphorus After All

  Two new reports detailed online in the journal Science show that the bacterium known as GFAJ-1 requires small amounts of phosphate to grow — and that it cannot substitute arsenic for phosphorus to survive, as one previous report had suggested. The GFAJ-1 bacterium. Image credit: Science/AAAS The GFAJ-1 bacterium, found in the arsenic-rich sediments of California’s [continue reading]