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During a lab visit in 1990, Jane Goodall disregarded the caution of some workers there to get close to an alpha chimpanzee and communicate with it

Goodall's groundbreaking years observing chimps helped change humans' understanding of the natural world

She died last week of natural causes at 91 while on a speaking tour

Editor’s note: When news broke last week of the death of famed ethologist and conservationist Jane Goodall , at age 91, Ron Arias was reminded of the time he’d spent with her for a magazine profile years ago — and two unforgettable scenes he witnessed with two very different animals.

Here, Arias, a longtime former PEOPLE writer, shares that story.

Ken Regan had known Jane Goodall since before she'd become an institution. Early in her decadeslong career, h

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