Photographer Tom Murphy has documented the park's wildlife for decades. Now, one of his photos will be on a Forever Stamp.

Wyoming’s wild bison are the first of the ungulates (hooved animals) to kick off the fall breeding season, or rut. For bison, the rut starts in July, but really gets going in August and carries into ...

The bison from Yellowstone National Park had finally arrived. After nine hours of travel — and one flat tire — a large ...