Twin brothers Frank and John Craighead launched a 12-year radio-tracking study of Yellowstone area grizzly bears in 1959.
New book tells story of grizzly No. 399, and of wildlife conservation in the greater Yellowstone.
The U.S. Fish and Wildlife Service is assisting the Wyoming Game and Fish Department in an investigation into a hunter-grizzly conflict in which a grizzly died in the Upper Green River Basin.
Agencies, companies have different policies to protect workers in grizzly backcountry; few have written requirements mandating carrying bear pepper spray.
Investigators believe they have found both grizzly and black bear hairs on the remains of a Virgin, Utah, man whose employer reported him missing last week.