More likely is it was a binary http://www.newscientist.com/article/dn23126-dinosaurkilling-asteroid-was-a-twin-terror.html http://www.newscientist.com/article/

More likely is it was a binary http://www.newscientist.com/article/dn23126-dinosaurkilling-asteroid-was-a-twin-terror.html http://www.newscientist.com/article/dn23126-dinosaurkilling-... 15% of near earth objects are binaries, a fact that is not widely known. Edit: asteroids --> objects