NASA is about to grab a chunk of rock from asteroid Bennu

NASA's OSIRIS-REx spacecraft is about to touch an asteroid. It has been orbiting the space rock Bennu, which is currently more than 320 million kilometres from Earth, since December 2018. On 20 October it will take a sample to bring home. The hope is that this material will help us understand more about the earliest history of our planet. To take the sample, OSIRIS-REx will extend a robotic arm and use it as a sort of pogo stick on the asteroid's surface.