That headline might sound a bit OTT, but it’s the gist of what NASA aims to achieve when it crashes a spacecraft into a piece of space rock this morning. Don’t worry, the end is not nigh… But it is part of a world-first experiment to see whether it would be possible to deflect an asteroid that’s on track to hit Earth and avoid a potentially catastrophic impact that could see us go the same way as the dinosaurs. The DART mission – aka Double Asteroid Redirection Test – targets an asteroid measuring 160m in diameter called Dimorphos, which poses no threat to Earth and orbits a larger asteroid named Didymos. And we’ll get a chance to see what unfolds with a briefcase-sized satellite set to record the collision and stream the images back to Earth. You can watch the live stream here.