NASA Science News for May 16, 2012
NASA has just released a new count of asteroids that come close to the orbit of Earth and could survive entry through our planet's atmosphere. The data, gathered by an infrared space telescope named WISE, reveal important new information about the origin and make-up of these potentially hazardous space rocks.
FULL STORY: http://science.nasa.gov/science-news/science-at-nasa/2012/16may_pha/