ALPINE, Texas, March 13 -- Sul Ross State University issued the following news: * * * Rare mammoth tusk discovered at West Texas ranch Although he was searching for deer, a hunter at the O2 Ranch in Brewster and Presidio counties found something very different and a little puzzling. Could it be a mammoth tusk? In West Texas? "I was skeptical when a deer hunter showed me a picture of what he thought was a fossil," said O2 Ranch Manager Will Juett. "I figured it was likely just an old stump,   more