The head of Blue Babe, a mummified ice age bison, rests recently in a lab at the University of Alaska Museum of the North. The bison, uncovered near Fairbanks in 1979, was first described by Dale Guthrie, now professor emeritus. Most of Blue Babe's skin was preserved and is now publicly displayed on a model at the museum, but the head and horns were kept frozen. Professor Matthew Wooller and others are now analyzing them to improve our understanding of Blue Babe's environment. The work includes extraction of collagen from the bones for nitrogen isotope analysis.