The return of the bison means the return of the prairie, one of the three great grassland ecosystems on the planet.

Grizzly bear Tim enjoys his tree enrichment at Brookfield Zoo Chicago. More than 900 Balsam fir trees used during Brookfield Zoo Chicago’s Holiday Magic event are repurposed every year as mulch, ...

Ever thought about buying a bison? They're big, hairy (and sometimes dangerous) animals. Adult bison reach about six and a half feet in height and can weigh up to 2,800 pounds. The U.S. Department ...