A NASA spacecraft OSIRIS-REx touched down on the rugged surface of the Bennu asteroid on Tuesday, grabbing a sample of rocks dating back to the birth of our solar system to bring home. The minivan-sized OSIRIS-REx spacecraft, built by Lockheed Martin, unfurled its 11-foot (3.35 m) robotic arm toward a flat patch of gravel near … Continue reading NASA spacecraft OSIRIS-REx lands on ancient asteroid, brings back rubble for study