Science magazine is retracting a 15-year-old NASA paper claiming a bacterium can use arsenic instead of phosphorus. NASA disagrees with the retraction, citing the journal's unprecedented action and lack of consistent application of its new standard. NASA maintains its commitment to transparency and scientific integrity. A dispute arose between Science magazine and a blogger regarding the embargoed retraction announcement, with NASA defending its right to release its statement independently.

Prepared by Olivia Bennett and reviewed by editorial team.