Stop an Asteroid heading for planet Earth!
If the dinosaurs had technology like us they would have survived the asteroid that wiped them out by sending up a rocket to stop it.
This is what Nasa has done recently. They shot a rocket up to hit an asteroid to see if they could change it's course. But it was only a test - the asteroid wasn't coming our way!
But what would happen if the asteroid hit breaks into parts and lots of pieces come down onto Earth? Then we'd have a problem!
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NASA has smashed a spacecraft into an asteroid and a small satellite watched the whole thing happen. The Double Asteroid Redirection Test (DART) crashed into the 160-metre-wide moonlet Dimorphos on 26 September. Now, the Light Italian CubeSat for Imaging of Asteroids (LICIACube) has sent back images of the collision from up close. source