A 1-year-old Australian shepherd took an epic trek across 150 miles of frozen Bering Sea ice that included being bitten by a seal or polar bear before he was safely returned to his home in Alaska. Mandy Iworrigan, the owner who lives in Gambell, Alaska, and her family were visiting another community in the Bering Strait last month when the dog — named Nanuq — disappeared with their other family dog, Starlight. Starlight turned up a few weeks later, but Nanuq was nowhere to be found. About a month after Nanuq disappeared, people in Wales, Alaska, 150 miles northeast of his starting point, began posting pictures online of what they described as a lost dog. The events of Nanuq’s journey will likely always be a mystery.