Researchers Say NASA Could Be Overlooking Signs of Alien Life

A Nature Astronomy study warns astrobiology may be missing alien life on Mars and exoplanets because current methods can produce false negatives.

Researchers say today’s tools and search strategies are designed more to avoid false positives than to find subtle biosignatures.

The authors urge better hypotheses, more lab and field testing, and AI-assisted analysis to improve detection.

They warn that missed life could mean overlooking habitable worlds or even harming undiscovered ecosystems during exploration.