NASA's Perseverance Mars rover spots a scattering of bizarre bright white pebbles of a mysterious composition and origin.

During its recent exploration of the crater rim, Perseverance diverted to explore a strange, scattered field of bright white ...

"On Mars however, with its lack of plate tectonics and a basaltic crust dominated by dark minerals like olivine and pyroxene, white rocks are a rare find," NASA said in a Nov. 12 statement.