Brothers John and Frank Craighill knew there was a problem when they saw fewer and fewer grizzly bears at Yellowstone National Park. But how did grizzlies--with a population size once as big as 100,000--wind up on the endangered species list? Follow along in this graphic adventure based on a true story of how the Craighill brothers learned all they could about these beautiful bears in order to save the silvertip. Then, learn more about grizzlies and other bears in danger.