Did the Ancient Greeks and Native Americans Swap Starcharts? Author Ker Than I had a story on SPACE.com yesterday about a very cool discovery: a one-thousand year old petroglyph, or rock carving, that was found in Arizona and which might depict the supernova of 1006, or SN 1006. The carving is presumed to have been made an ancient group of Native Americans called the Hohokam. The researcher who made the discovery argues that symbols of a scorpion and stars on the petroglyph match the relative positions of SN 1006 to the constellation Scorpius when the star first exploded. Well, after...