A Colorado man required medical treatment at a hospital after he was gored by a bull bison at Yellowstone National Park in Wyoming, officials said.

A Colorado man required medical treatment at a hospital after he was gored by a bull bison at Yellowstone National Park in Wyoming, officials said.

CAPROCK CANYONS STATE PARK, Texas - The rumble from stampeding bison used to shake the earth as thousands of the majestic animals thundered across these parts centuries ago.