Egyptian archaeologists have discovered a pyramid buried in the desert and thought to belong to the mother of a pharaoh who ruled more than 4,000 years ago, Egypt's antiquities chief said on Tuesday.  The pyramid, found about two months ago in the sand south of Cairo, probably housed the remains of Queen Sesheshet, the mother of King Teti, who ruled from 2323 to 2291 B.C. and founded Egypt's Sixth Dynasty, Zahi Hawass told reporters.  Full Article