Plan to save Earth from asteroid impact
NASA scientists suggest we could drag threatening space rocks away with a rocket. No towropes involved - just the pulling power of gravity.
Antenna investigates the gravity tractor...
This story was reported in Nature on 10 November 2005
Plan for a gravity tractor
Meet the gravity tractor's inventor
It's happened before...
Image: Dan Durda, FIAAA / B612 Foundation
Visit the museum