Many biologists were saying from the start that Felisa Wolfe-Simon and colleagues never supported their 2010 claim that they’d discovered a life form that could substitute arsenic for phosphorus in its DNA and other biomolecules.
Since then, several published papers have refuted that claim, which was published in Science and touted in a NASA press conference that led to worldwide headlines about rewriting textbooks and evidence for a so-called shadow biosphere. If there was an award for the all time most extreme example of NASA hype, that press conference should win.
The latest paper appeared in this week’s issue of Nature, and was picked up by a number of science writers. Nature news writer Daniel Cressey covered it here. Carmen Drahl of...