The man who was attacked by a bison at Yellowstone National Park has a theory as to why it happened. Mike MacLeod, the professional photographer who captured the moment a bison tossed Carl Isom-McDaniel eight feet into the air in a video that has since gone viral,

Yellowstone National Park will not take action against the bison that seriously injured a visitor during a widely shared attack last week, with park officials determining the animal will remain in the...