In 2010 a paper in Science suggested that a bacterium in Mono Lake, California, used arsenic instead of phosphorus in its genetic code and represented a new form of life.
That month, a trio of studies published in the journals Nature and Science suggested impacts of Chelyabinsk's magnitude were between three and 10 times more likely to happen than previously supposed.
A study published last week in the journal Science suggested that might be the case, reporting that many patients who had the syndrome were infected with a recently discovered virus.
Monica M. Bradford, executive editor of the journal Science, suggested that the extra attention high-impact journals get might be part of the reason for their higher rate of retraction.
A recent paper in the journal Science suggested that even regulation may not help: polling showed that regulation mandating such self-sacrifice wouldn't be supported by a majority of people, and that they'd avoid buying self-driving cars as a result.
Mr. Friedman, of the national board, said over all, the city's poor performance in science suggested that the emphasis on math and English, which have been the main measures of school progress under the federal No Child Left Behind law, had come at the expense of other subjects.
