Yellowstone is home to nearly 5,000 bison, which must contend with wolves in the winter, and wolves and grizzly bears during ...

In this instance, it's not immediately clear what caused the bison to stampede. Unofficial Networks ... of these animals once roamed the North American continent," they said.

Imagine sitting in your car on a bridge with a hundred massive bison charging towards you. As the bridge shakes, their hoofbeats grow louder. Just as you wonder if the herd will collide directly with ...