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It's Fat Bear Week.
Brown bears Alaska's Katmai National Park have been bulking up for winter.
National Parks Service/Explore.org
Voting takes place in rounds, organized in bracket format, not unlike March Madness.
Last year's winner, Holly, is in the running again.
Can she pull off another win?
Holly will be up against the winner of a first-round contest between bears 719 and Chunk.
There are 12 bears total in the running. Voting opens every day at noon Eastern.
The winner will be announced October 6 — Fat Bear Tuesday.