The claim

““NASA just announced evidence of alien life found by the James Webb Space Telescope.””

There is no verified NASA announcement confirming evidence of alien life from JWST; reported findings about possible biosignature gases remain tentative and heavily debated.

Viral posts often conflate preliminary research results (or media coverage of them) with an official NASA confirmation of extraterrestrial life. JWST can measure exoplanet atmospheres and has produced important results, but detecting “life” is not something it can confirm from a single observation, and potential biosignature gases can have non-biological explanations. As of available official communications, NASA has not issued a statement confirming evidence of alien life discovered by JWST. Claims of “life detected” typically stem from interpretations of atmospheric signals reported in studies or press coverage, which scientists stress require additional observations, independent verification, and careful ruling out of abiotic processes.