Jane Goodall, a renowned naturalist, has died at the age of 91. She was known for her groundbreaking research on chimpanzees, which challenged traditional views of human uniqueness and revealed the complexity of primate behavior. Goodall's work, which spanned over six decades, included the discovery that chimpanzees use tools and exhibit human-like emotions and behaviors. Her research and advocacy have had a lasting impact on the field of primatology and conservation.