Science' retracts controversial study on mysterious microbe, 15 years later
NASA's study claimed the discovery of GFAJ-1, an arsenic-based life form, but was met with skepticism and ultimately retracted by the journal Science due to ongoing controversy.
Controversial 'arsenic life' paper retracted after 15 years - but authors fight back
Science's retraction statement indicates that the criteria for retractions have expanded, now including cases where reported experiments do not support key conclusions of a paper.
Doubts grow about the biosignature approach to alien-hunting
Phosphine detection on Venus remains controversial and raises questions about biosignature evidence for alien life. Exoplanet atmosphere studies face similar challenges.