LONDON - Scientists are to discuss the threat posed by an asteroid hitting the earth amid claims that the British Government is failing to wake up to the ask. Experts believe the chances of being killed by an steroid impact is four times higher than that of dying in a plane crash.
An asteroid half a mile across smashing into Earth at 20 miles per second would cause an explosion equivalent more than 1,000 of the most powerful hydrogen bombs yet detonated.
