Jane Goodall, world renowned for her pioneering work studying chimpanzees in what is now Tanzania and a longtime conservationist, has died, according to a statement from the Jane Goodall Institute. She was 91.

She died of natural causes, according to the statement, while she was in California on a speaking tour.

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"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 Institute said in its statement.

Goodall continued to work protecting chimpanzees from extinction until her death. As part of that campaign, she believed it was necessary to improve the lives of the local people, mostly with anti-poverty and youth

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