@mashable: Curiosity Rover is Graffiti Artist, Tagging Mars in Morse Code [VIDEO] - http://t.co/4S4VH0A7

Curiosity Rover is Graffiti Artist, Tagging Mars in Morse Code [VIDEO] - http://t.co/4S4VH0A7 http://twitter.com/mashable/status/239056241740115968