Timothy Treadwell, noted bear enthusiast and documentary filmmaker, was killed and eaten by a 28-year-old grizzly bear in Katmai National Park in Alaska. He was later the subject of Werner Herzog's documentary "Grizzly Man," which was largely based on his own footage.
Treadwell was the founder of Grizzly People, a bear-protection organization. For thirteen summers he lived among the bears in Katmai National Park but was attacked and killed along with his girlfriend in the final summer he spent there. Treadwell frequently got close to the bears he was observing, sometimes even touching them. He claimed he had developed close relationships with many bears, while park rangers viewed his activities as wildlife harassment.