Viral video captures a wolf stalking a tourist hiking through Lamar River Valley in Yellowstone National Park before he used spray to fend it off.

Ignazio Zanin, visiting from Texas, was followed by the wolf for over 10 minutes. Despite using bear spray twice, the wolf continued to trail him.

Add Yahoo as a preferred source to see more of our stories on Google. A man was seriously injured after being tossed 8 feet into the air by a bull bison in Yellowstone National Park, video shows. The ...

A man visiting Yellowstone National Park was severely injured Friday after being charged and launched 8 feet into the air by a bison. The unidentified man was with his grandson taking a photo when he ...

Yellowstone National Park is unlike anywhere else on Earth. Yellowstone National Park is unlike anywhere else on the planet. It's the last intact temperate zone ecosystem on Earth and has a wide ...

Yellowstone National Park in the state of Wyoming is one of the United States' ecological treasures. Composed of more than ...

Carl Isom-McDaniel was visiting Yellowstone National Park - known for its growing bison population - with his 13-year-old grandson when things took a shocking turn. A giant bull bison charged and ...

A bison in Yellowstone National Park was caught on video popping a vehicle's tire. Tourists continue to prove they have no idea how to behave in nature. Anyone who reads this site knows that there is ...

Emily Mae Czachor is a reporter and news editor at CBSNews.com. She typically covers breaking news, extreme weather and climate. Emily Mae previously wrote for outlets like the Los Angeles Times, ...

A man was seriously injured after being tossed 8 feet into the air by a bull bison in Yellowstone National Park, video shows. The animal, clearly agitated, appeared to target the man in footage ...