Chunk eating a fat piece of salmon in Brooks River’s “jacuzzi” in 2017. Photo Courtesy of A. Ramos/NPS Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. The king has returned. Maintenance workers at Katmai National Park in Alaska spotted 2025 Fat Bear Week champion Chunk. In a video shared by Katmai Conservancy, National Park Service (NPS) maintenance crews spotted the roughly large adult male brown bear ( Ursus arctos ) walking along on a patch of ice in the park.  Bears are not seen as frequently during the spring, so this early glimpse of Chunk is exciting. Katmai is a home and hunting ground for some of the largest brown bears in the world. They bulk up every summer on the salmon running up the Brooks River. Fatter bears are more likely to survive hibernation and the long winter ahead.…