A herd of bison (not the one pictured here) charged into a crowd of people in Yellowstone National Park. Photo by Tevin Trinh via Unsplash A pack of wolves took down a bison in Yellowstone ...

The bison lope along in single- or double-file lines, and when they reach the Cheyenne River, which marks ... they splash through it like a herd of wildebeests crossing the Nile.