Threat From Deadly Asteroids 'Ten Times Worse' Than Previously Thought?

The risk of large asteroids hitting Earth is ten times larger than we previously thought, according to a new study. Three extensive studies of the asteroid which exploded above the Russian town of Chelyabinsk in February, resulting in injuries to 1,000 people, shows that it was not as extraordinary as previously thought. Hundreds of cameras captured the moment when the meteor blasted through the blue Russian sky. It was hard to miss - it shined 30 times brighter than the Sun and exploded with th...