Sheriff's deputy Katarina Brown was just starting to examine the bone in the sinkhole when she looked down at the shifting earth under her feet. She was standing inches from an eerie set of white teeth. It was a skull - make that two skulls, complete with jawbones and eye sockets. Bending closer, she could see each skull had a hole the size of a quarter in the back of the cranium. These didn't look like old bones."Don," she yelled to archaeologist...