Grizzly bears are considered dangerous because of their size and aggressiveness when they feel threatened, but here's how ...

The male had just a few teeth left and weighed 170 pounds, just a fraction of the 450 pounds the bear weighed as a 5-year-old when he was captured in the Shoshone National Forest in August 1991.

Wayne Kasworm, a wildlife biologist for the U.S. Fish and Wildlife Service, still thinks about Bear No. 678 from time to time. The iconic female grizzly called the Cabinet Mountains ...