A stray mixed-breed dog, hungry and searching for food, back in October tagged along with some hikers south of the border who were feeding him, and together they scaled Pico de Orizaba, the highest mountain in Mexico.
But when it came time for the humans to make the treacherous decent back down, the dog straggled behind; while the humans went home, he endured subzero temperatures for almost a month—until a climber eventually snapped a photo of him, posted it on social media, and it went viral.