Aug 15, 2022
Ancient asteroids are covered with popcorning pebbles, new study finds
In 2019, when NASA's OSIRIS-REx spacecraft approached the asteroid Bennu, scientists saw something stunning in the images beamed back to Earth. The surface of the space rock wasn't calm — instead, swarms of marble-sized rocks were popcorning off the asteroid. Now, a new study of a meteorite that landed on...