STAFF PHOTO BEN GOFF Volunteers Gene Cagle, from right, and his sons Jessie Cagle and Gene Cagle II, attach the tail to a Siberian woolly mammoth skeleton Tuesday while installing the new acquisition at the Museum of Native American History in Bentonville. The roughly 12,000-year-old skeleton will help the museum interpret the history of native people in the Americas dating back to the paleo period when humans hunted mammoths.