The National Park Service warns visitors not to 'pet the fluffy cows' at Yellowstone, but sometimes curiosity still gets the better of people seeing bison for the first time – and yes, some do indeed ...

A woman strolled right up to a bison at Yellowstone National Park this week, and only held back from petting it after a Park Ranger intervened. Bison injure more people at Yellowstone than any other ...

The chart was posted hours after a video showing a man petting a bison in Yellowstone National park surfaced on the internet.

It's rutting season for bison at Yellowstone National Park, with hormones running high and tempers fraying, but it seems some visitors just can't resist the opportunity to get up close to the huge ...