Dian Fossey

Fossey was a leading primatologist, and a member of the "Trimates", a group of female scientists recruited by Leakey to study great apes in their natural environments, along with Jane Goodall who studies chimpanzees, and Birutė Galdikas, who studies orangutans.
Fossey spent 20 years in Rwanda, where she supported conservation efforts, strongly opposed poaching and tourism in wildlife habitats, and made more people acknowledge the sapience of gorillas. Following the killing of a gorilla and subsequent tensions, she was murdered in her cabin at a remote camp in Rwanda in December 1985. Although Fossey's American research assistant was convicted ''in absentia'', there is no consensus as to who killed her.
Her research and conservation work helped reduce the downward population trend in mountain gorillas. Provided by Wikipedia