As a diplomatic dispute rages between Egypt and the auction house Christie's in London over a sculpture depicting the head of the pharaoh Tutankhamun, set to be auctioned on July 4, a Live Science investigation reveals several clues as to where this sculpture comes from. The sculpture, being auctioned off by an anonymous owner through Christie's, is made of quartzite (a type of stone). Estimates for how much the sculpture will fetch vary around $5.1 million (4 million pounds). However, Egypt believes that it was looted from the Karnak temple sometime after 1970, and the country's embassy in the U.K....