Article continues below advertisementDr. Jane Goodall, the famous animal welfare activist, has died at 91 years old. According to a statement on Wednesday, October 1, from her eponymous institute, she died of natural causes while on the West Coast. "She was in California as part of her speaking tour in the United States. Dr. Goodall's discoveries as an ethologist revolutionized science, and she was a tireless advocate for the protection and restoration of our natural world," the post read via Instagram. "Dr.