A woman visiting Yellowstone National Park learned the hard way why people should not try to pet the bison. Video shows a tourist attempt to pet a bison grazing by a pathway May 20 after a group ...

A New Jersey tourist was gored by a bison at Yellowstone National Park after a large group of visitors approached the animal too closely, officials said. The 30-year-old man from Randolph was struck ...

An 83-year-old woman was gored by a wild bison that was “defending its space” in Yellowstone National Park, according to officials. The unidentified visitor from Greenville, South Carolina, suffered ...

An 83-year-old woman was seriously injured after being gored by a bison last weekend in Yellowstone National Park, the National Park Service said. The bison was “defending its space,” and approached ...

A bison gored a 47-year-old Arizona woman Monday morning in Yellowstone National Park in Wyoming, leaving her with significant injuries to her chest and abdomen, park officials said. The woman was ...

A bison attacked a tourist earlier this week in Yellowstone National Park after the man got too close. The incident occurred on May 4 in the Lake Village area of the park near popular attractions such ...

Editor’s Note: “Close Encounters: Tourists in the Wild” on The Whole Story with Anderson Cooper takes us to Yellowstone National Park, where visitors behaving badly can lead to dangerous encounters ...

A new study finds free roaming bison in Yellowstone National Park are reshaping the ecosystem. They have had a positive effect on grasses and soil, but some changes may not be for the better. A couple ...

A bison in Yellowstone National Park appeared to stumble into the scalding water of Grand Prismatic Spring, causing its death as tourists looked on during the park's busiest season. The bison fell ...

Cara Tabachnick is a news editor at CBSNews.com. Cara began her career on the crime beat at Newsday. She has written for Marie Claire, The Washington Post and The Wall Street Journal. She reports on ...