Martian mudstones contain features that NASA says are the "clearest sign of life" yet on Mars, according to new findings from NASA’s Perseverance rover released Sept. 10. Specifically, the stones show signs of possible ancient microbial life,

NASA’s Mars rover Perseverance has uncovered rocks in a dry river channel that may hold potential signs of ancient microscopic life, scientists reported Wednesday.

“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...