Bison jams are not uncommon in Yellowstone given their population at the park has ranged from 3,500 to nearly 6,000, the ...

Rangers at the country’s oldest national park plan to open major roadways and entrances to the site starting Friday as part ...

Yellowstone's Junction Butte wolf pack failed in a recent attempt to kill a bison, but the pack appears to be thriving again after the death of its former alpha female, Wolf 907F.

The only National Park I’ve spent more time in than Yellowstone National Park is Glacier NP. Our 4 day Yellowstone itinerary ...

Unlike their ranched cousins, which are mainly the result of 20th-century attempts to cross bison with cattle, the Yellowstone animals are wild and genetically pure, descendants of the original ...

At the base of the Grand Teton Mountain range, a new fish species tinged with green was identified as separate from its blue brethren.

Beneath the steaming geysers and bubbling mud pots of Yellowstone National Park lies one of the world's most closely watched volcanic systems. Now a team of geoscientists has uncovered new evidence ...

Resurrecting extinct animals is both “exhilarating and terrifying,” says Beth Shapiro, an expert in ancient DNA and a biologist at the University of California, Santa Cruz. Exhilarating ...