Deep in outer space, a diamond-shaped asteroid is hurtling towards Earth. If the two bodies collide, the space rock – known as Bennu – is big enough to extinguish life on our planet. But the asteroid is not alone. No, a NASA probe has been chasing the massive space rock for years. And having caught up with the colossal asteroid, the craft is preparing to land on its rocky surface. It’s a high-risk maneuver that demands absolute precision, but it’s one that could help secure the safety of humankind.