"So far, all lifeforms on Earth have a phosphorous-based chemistry, particularly as the backbone of DNA," writes longtime Slashdot reader bshell. "In 2010, a paper was published in Science claiming that arsenic-based bacteria were living in a California lake (in place of phosphorous). That paper was finally retracted by the journal Science the other day." From a report: : Some scientists are celebrating the move, but the paper's authors disagree with it -- saying that they stand by their data a…