Jane Goodall, the conservationist renowned for her groundbreaking chimpanzee field research and globe-spanning environmental advocacy, has died. She was 91.

The Jane Goodall Institute announced the primatologist’s death on Wednesday in an Instagram post. According to the Washington, D.C.-based institute, Goodall died of natural causes while in California on a U.S. speaking tour.

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Her discoveries “revolutionized science, and she was a tireless advocate for the protection and restoration of our natural world,” it said.

Goodall was also a strong supporter of Sudbury’s regreening efforts, which transformed the city from a barren, industrial landscape into one of the world’s most successful examples of environmental rehabilitation. She praised Sudbury for proving that “a

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