A rock sample collected by NASA’s Perseverance Mars rover may contain evidence of ancient microbial life, preserved for billions of years on the Red Planet.

NASA has found “the clearest sign yet” that life once existed on Mars, the agency announced on Wednesday.

"It's kind of the equivalent of seeing like leftover fossils, you know, leftovers from a meal, and maybe that meal has been excreted by a microbe. And that's what we're seeing in this sample," Nicky ...