August 15, 2014
Researchers at the University of Tennessee have discovered that blowing the space rock up could make the collision worse by causing several devastating impacts.
Instead, small changes could be made to its surface to disrupt the forces keeping it together and cause it to break up in outer space.
They were studying asteroid 1950 DA, which has a one in 300 chance of hitting the planet on 16 March, 2880.
Plenty of time to fix things, unless we forget about it when civilization collapses or something.