Jane Goodall, the world’s foremost expert on chimpanzees and a lifelong advocate for wildlife, has died at 91. The Jane Goodall Institute confirmed she passed away of natural causes on October 1, 2025, while on a speaking tour in California.

Goodall’s journey began in 1960, when she traveled from England to what is now Tanzania to study wild chimpanzees. Her patient observations in Gombe reshaped science’s view of our closest relatives, revealing tool use, social bonds, and distinct personalities. She later earned a Ph.D. from Cambridge and founded the Jane Goodall Institute in 1977, championing conservation and youth engagement.

Over six decades, she appeared in numerous documentaries and books, carrying her message of hope worldwide. Even in her nineties, Goodall remained on the road, urging action to protect animals and the planet. Her final days reflected that lifelong commitment.

Leonardo DiCaprio, who shared her role as a U.N. Messenger of Peace, offered a heartfelt tribute. On Instagram, he praised her groundbreaking research, global advocacy, and enduring hope, calling her his hero and urging followers to support her institute’s work.

The two recently collaborated on Howl, a forthcoming film told from the perspectives of a dog and a wolf. As executive producers, Goodall and DiCaprio highlighted storytelling as a tool to inspire empathy and conservation.

News outlets recalled her landmark discovery of chimpanzees using sticks to fish termites—an observation that shattered the belief tool use was uniquely human. By naming her subjects and documenting their emotions, Goodall bridged the gap between humans and other animals.

In recent years, her message emphasized urgency and optimism. She reminded audiences that youth leadership and small actions could drive environmental progress.