Wildlife and nature enthusiasts are grieving a famous mountain lion after it was hit by a car and killed while crossing a highway in Southern California. The mountain lion, lovingly nicknamed Uno because of an old eye injury that left one of her eyes cloudy, was crossing Santiago Canyon Road in Orange County — a highway the cat had safely crossed countless times before — when she was hit, the California Mountain Lion Project at the University of California, Davis said Jan. 19 on Instagram. Wildlife enthusiasts tried to save Uno’s life, but the mountain lion died from “massive head and chest in…