Yellowstone National Park is moving forward with a plan to help create new herds of wild, genetically-pure bison across the country.

The first calf born through in vitro fertilization is now part of the Laramie Foothills Bison Conservation Herd. The calf, a 10-month-old named IVF1, is鈥�

On crisp, sunny morning in February, Jennifer Barfield threw large vegetable pellets from her car window. She was trying to lure a distant herd of bison鈥�

It's a windy morning in early June, and Colorado State University researcher Jennifer Barfield is peering anxiously at a herd of bison. One is trying,鈥�