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.

“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 focused on chimpanzees for more than 60 years, studying their family and social relationships. She was 26 when she traveled from England to what is now Tanzania in July 1960. She entered the forest in the Gombe Stream National Park with only a notebook and binoculars, according t

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