Fat Bear Week Is Underway! Root for Your Favorite Bear and Match up These Cubs

Alaska's Katmai National Park's annual tournament, Fat Bear Week, is officially underway. The bracket, revealed on Twitter on Friday, showed off this year's contenders, including Chunk, Grazer and last year's winner, Holly. Voting will begin on Sept. 30, but until then, you can get to know these chubby bears. For now, match these little cubs, and don't forget -- fat bears are healthy bears.