earthScientists have moved closer to being able to stop a huge asteroid colliding with the Earth and potentially wiping out human life. 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 first became infamous in 2002 when astronomers estimated it had a one in 300 chance of hitting the planet on 16 March, 2880. However, the odds of a collision were later revised to a more reassuring one in 19,800. The asteroid has a diameter of one kilometre and is travelling at nine miles a second relative to the Earth, which it would hit at 38,000 miles per hour. More