Dr. Jane Goodall , widely regarded as the world's most celebrated expert of chimpanzees, was officially determined to have died of cardiac arrest earlier this month, TMZ reports.

Goodall's cause of death is listed as cardiopulmonary arrest, which occurs when the heart and lungs stop working properly, resulting in a sudden loss of blood flow and oxygen, according to her death certificate. The Jane Goodall Institute confirmed her passing in statement shared on its social media accounts on. October 1.

"The Jane Goodall Institute has learned this morning, Wednesday, October 1, 2025, that Dr. Jane Goodall DBE, UN Messenger of Peace and Founder of the Jane Goodall Institute has passed away due to natural causes," the statement reads. "She was in California as part of her speaking to

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