Scientists design spacecraft to save Earth
Heroic missions to stop life on Earth from being wiped out by an asteroid have become a favourite theme for Hollywood disaster films.
Now, a team of British engineers have designed a real-life spacecraft to save the world from destruction.
Their invention, called a "gravity tractor", would be deployed when an orbiting rock is detected on a collision course with Earth.
The spacecraft would intercept the asteroid and position itself to fly alongside it, just 160ft from its surface.
Sounds like it could really work but first find the asteroid...