A psychological phenomenon called Mandela effect where people in peer influence subconsciously feed false memories in their brains, one such case is of Koko the gorilla who was presumed dead because of the collective memory failure.
Hanabiko "Koko" is a female western lowland gorilla who is known for her fluent communications abilities having learned a large number of hand signs from a modified version of American Sign Language (ASL).
Her instructor and caregiver, animal psychologist Francine "Penny" Patterson, reports that Koko is able to understand more than 1,000 signs of what Patterson calls "Gorilla Sign Language" (GSL). In contrast to other experiments attempting to teach sign language to non-human primates, Patterson simultaneously exposed Koko to spoken English from an early age.
Francine, 69, first met Koko at the San Francisco Zoo in 1971, when she was a 24-year-old graduate student at Stanford University. The following year she began teaching sign language to the baby gorilla as part of her Ph.D. project, which made Koko famous around the world for her ability to “talk.” But over the course of 45 years, what started as a scientific experiment has evolved into an unconventional family arrangement.
Williams was introduced to Koko when he visited the Gorilla Foundation in Northern California back in 2001. As seen in a reposted video by the organization, the two laughed and hugged during Williams' visit. Recalling that encounter, Koko became visibly emotional once learning that Williams had passed away in 2014.
Koko has become old and is not very active, so people don’t get to hear about her and penny. Fueling the rumors; Koko mighty have died of age since she only appeared last after Robin Williams passing 2014.
Source = "shane"
The Mandela Effect refers to a phenomenon in which a large number of people share false memories of past events, referred to as confabulation in psychiatry. Some have speculated that the memories are caused by parallel universes spilling into our own, while others explain the phenomenon as a failure of collective memory.
Wikipedia would have mentioned any such cases if the only talking gorilla were to pass.
It is just curious folks who want to know about the cool gorilla that once clouded the internet with her unusual talents.
Now that she is off the internet since long, Koko has people concerned from around the web for her well being, as she is getting older each passing day.
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