Asteroid impact URL's from Sandia Labs, NASA, JPL, etc. at the bottom of this URL, <URL: http://www.discover.com/science_news/impact.html > Asteroid Surveys and Studies Near-Earth Asteroid Tracking Homepage The NEO Pageat the Harvard-Smithsonian Center for Astrophysics The Spacewatch Projectat the University of Arizona Radar studies of asteroidsat the Jet Propulsion Laboratory Impact Studies Asteroid impact effectsfrom Permanent Impact Cratersfrom Views of the Solar System Asteroid & Comet Impact Hazardsfrom NASA's Ames Research Center Asteroid
impact simulationfrom Sandia National Laboratories Impact simulations from Eric Asphaug of the University of California, Santa Cruz Impact Cratering Experimentsfrom NASA's Johnson Space Center
-- Michael Pugliese