Residents of central Minnesota's Morrison County have been exhibiting a strange behavior lately. On any given day, you're likely to find one of them sleuthing through a cemetary. These "bone yard" afficianados are volunteers in a unique fact-finding project for the Morrison County Historical Society. As Minnesota Public Radio's Gretchen Lehmann reports the project, which at first seems tailor-made for the morbidly curious, is actually drawing a wide variety of participants.