A potentially huge discovery by NASA's Perseverance Mars rover will likely remain in scientific limbo for years to come.
On Wednesday (Sept. 10), the Perseverance team announced it found possible biosignatures in pieces of a Mars rock called "Cheyava Falls" that the rover first studied last year. Those intriguing chemical fingerprints include the iron-containing minerals vivianite and greigite, which Perseverance spotted in the clay-rich sediments of a long-dry lakebed.
