The Mars rover also found millimeter-length splotches surrounded by black rings that contain iron and phosphate, which could also indicate life. These rings around the spots form on Earth from chemical reactions caused by microbes.
David Flannery, a member of the Perseverance team, said, “On Earth, these types of features in rocks are often associated with the fossilized record of microbes living in the subsurface.”
Another scientist on the rover team, Morgan Cable, confirmed that these three things have never been seen together on Mars before. The Mars rock that could contain signs of ancient life was dubbed “Cheyava Falls” by the team and sits at the edge of a massive ancient river bed called Neretva Vallis.
Scientists have theorized that this river was carved out when water was running through the area into the Jezero Crater.
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