http://blogs.discovermagazine.com/badastronomy/2009/03/17/another-asteroid-shaves-the-earth/ http://www.google.com/hostednews/ukpress/article/ALeqM5ibtvWESroERqJwlaFzOpcjeu8NAQ http://www.nasa.gov/topics/solarsystem/features/fh-20090317.html