British primatologist Jane Goodall, founder of the Jane Goodall Institute, died Wednesday at the age of 91. She died while on a speaking tour in California.

“Jane Goodall redefined our understanding of the world around us and taught us the powerful difference one person can make,” former Speaker Nancy Pelosi said in a statement on Wednesday.

“Her passing touches the hearts of countless millions of people of every generation on every continent,” Sen. Peter Welch also said in a statement on Wednesday. “She was an extraordinary role model for young people of all nationalities and inspired many to seek careers in scientific discovery,” the Vermont Democrat continued.

Goodall, best known for her pioneering research on chimpanzees, made occasional trips to Washington and Capitol Hill to speak

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