"The discovery emphasizes the dynamic nature of Yellowstone's thermal activity," Yellowstone Volcano Observatory's Mike ...

In geology, even small layers can tell big stories. But figuring out the origins of such small layers can be a challenge, ...

Yellowstone National Park's geological history is one of the most intensely studied in North America. A new geologic unit gives clues.

Mesa Verde National Park in southwestern Colorado protects and preserves the cultural heritage of 26 tribes of Ancestral ...

Tourists at Yellowstone witnessed a bison's tragic death after it fell into the near-boiling waters of Grand Prismatic Spring, becoming trapped and unable to escape.

Bison herd stops traffic as it crosses road in Yellowstone A bison died after it appeared to stumble into a hot spring at Yellowstone National Park last week while visitors looked on.

A horse has been stranded on a gravel bar in the Yellowstone River near Mullowney Lane since Thursday evening.

Tourists on the trip of a lifetime to Yellowstone National Park were left horrified after a bison stumbled into one of the park’s scorching hot springs. The animal—one of between 3,500 and ...

A distressing video from Yellowstone National Park shows a bison falling into a scalding hot spring. Tourists witnessed the animal's struggle before i ...

A massive bison stopped cars on a road inside Yellowstone National Park in what Cindy Shaffer described as an “awesome one-man bison jam." ...

Onlookers at one of Yellowstone National Park's most popular sites watched a large bison take its final steps into a scalding hot spring and die in a horrifying reminder of what can happen away ...