The biggest bighorn sheep skull you've ever seen is on display this summer at the National Bighorn Sheep Interpretive Center in Dubois, Wyo. It was found in the 1970s, among the remains of camels, cheetahs, musk ox, short-faced bears and bison that fell thousands of years ago into an 80-foot-deep limestone cave in Wyoming's Bighorn Mountains. "This cave's opening is level with the ground, like a sinkhole," says center executive director June Sampson. "Once the animals fell in, they couldn't get out." The bighorn skull, on loan from the University of Kansas, is between 15,000 and 22,000 years old and is a full two inches wider between the eyes than contemporary sheep. A children's mural of the animals found in the cave will also be on display.
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