Jane Goodall ‘s cause of death has been revealed. According to a death certificate, Goodall’s cause of death is listed as cardiopulmonary arrest. She died on Oct. 1 at the age of 91.

The Jane Goodall Institute previously confirmed Goodall’s death in a statement , saying she had died from “natural causes” while in California on a speaking tour. According to the death certificate obtained and published by TMZ Monday, Jane also had epilepsy, but it did not specify if that played a role in her death.

“Dr. Goodall’s discoveries as an ethologist revolutionized science, and she was a tireless advocate for the protection and restoration of our natural world,” read the statement announcing her death from the Jane Goodall Institute. Goodall was on tour in California when she died, and was

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