NASA's Perseverance rover has discovered sediment formations that could be signs of possible biosignatures on Mars, but they could also have a non-biological source.

The discovery in Jezero Crater represents one of the best pieces of evidence to date about the possibility that Earth's planetary neighbor once harbored life.

“The discovery of a potential biosignature, or a feature or signature that could be consistent with biological processes, but that requires further work and study to confirm a biological origin is so...