A famous grizzly bear beloved for decades by countless tourists, biologists and professional wildlife photographers in Grand Teton National Park is dead after being struck by a vehicle in Wyoming. At 28 years old, No. 399 was the oldest known reproducing female grizzly in the Yellowstone ecosystem. Each spring, wildlife enthusiasts eagerly awaited her emergence from her den to see how many cubs she had birthed over the winter — then quickly shared the news online. Named for the identity tag affixed by researchers to her ear, the grizzly amazed watchers by continuing to reproduce into old age. Unlike many grizzly bears, she was often seen near roads in Grand Teton, drawing crowds and traffic jams. Scientists speculate such behavior kept male grizzlies at a distance so they would not be a threat to her cubs. Some believe male grizzlies kill cubs to bring the mother into heat. The bear had at least 18 cubs over the years, including a litter of four in 2020. She stood around 7 feet (2....