Dian Fossey (1932 - 1985) was an animal researcher who studied the behavior of gorillas in Africa under the direction of Dr. Louis Leakey.  She studied the social structure and relationships of gorillas in Rwanda starting in 1967 and lasting many years. She wrote a book about her experiences titled "Gorillas in the Mist" published in 1983.  Fossey was working at the Karisoke Research Center when she was the victim of an attack on Dec 26, 1985 and died in Rwanda. Her life story was made into a movie in 1988 starring Sigourney Weaver.