Jane Goodall , the famed conservationist known for her expertise on chimpanzees and her globe-spanning advocacy of environmental causes, died of cardiac arrest, according to reports.

TMZ reported the news on Monday citing Goodall’s death certificate.

Jane Goodall’s cause of death revealed

What we know:

According to the death certificate, Goodall's cause of death was listed as cardiopulmonary arrest — another name for cardiac arrest – an incident where the heart stops beating.

During cardiac arrest, people typically collapse and become unresponsive. Symptoms start without warning, and this is why people also call it sudden cardiac arrest, according to Cleveland Clinic.

The Jane Goodall Institute previously said that Goodall died of natural causes in California while on a speak

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