Bighorn Sheep Ram (Ovis canadensis), North Fork Shoshone River, Wyoming. A ram's skull is an engineering marvel; shock absorbing horn design, thick cortical bone, strategically placed trabecular bone, sinus cavities, and a multitude of unfused cranial sutures protect the combatants from brain injuries and death.
Bison (Bison bison), Yellowstone National Park, Wyoming.
hyperphagic black bear pursuing autumn hawthorn berries
