THESSALONIKI, Greece - A Greek hiker found a 6,500-year-old gold pendant in a field and handed it over to authorities, an archaeologist said Thursday. The flat, roughly ring-shaped prehistoric pendant probably had religious significance and would have been worn on a necklace by a prominent member of society. Only three such gold artifacts have been discovered during organized digs, archaeologist Georgia Karamitrou-Mendesidi, head of the Greek archaeological service in the northern region where the discovery was made, told The Associated Press. "It belongs to the Neolithic period, about which we know very little regarding the use of metals, particularly gold,"...