Cosmic curio: A little bit of Bennu
OSIRIS-REx travelled over 6 billion km in space to reach Bennu and get back to earth
NEW DELHI : Half a century ago, astronauts brought back a total of a few hundred kilograms of rocks from the moon. It generated great excitement, because this was the first extraterrestrial material humans ever examined. There have been meteor strikes, of course. But the moon rocks were the first such stuff that humans deliberately brought onto our planet.