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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
Asteroid attack
It's happened before...
Image: Dan Durda, FIAAA / B612 Foundation
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