Oliver was a chimpanzee. He captured the world's attention due to his unusual gait -- he sometimes walked fully upright on his two legs like humans when he was young. Read on to know more.

Oliver the Chimp

In the 1960s, when Oliver was a little child, he was taken from a family of chimpanzees and was never allowed to return home. This was because entertainers saw Oliver's potential to promote him as "The Missing Link" between humans and the other animals.

Oliver the Chimp rapidly gained notoriety as the "Humanzee" and became an international phenomenon. Several promoters teased him as a potential chimpanzee-human hybrid.

Oliver was portrayed as a jet-setting, sherry-drinking, stogie-puffing, coffee-loving, jet-setting star who was attracted to people sexually. He was featured in several shows, including The Ed Sullivan Show and Japan's Nippon television. Nobody ever brought up Oliver's previous freedom in the Congo or that Oliver was led by a chain and tethered by the promoters.

Oliver was again sold to the Pennsylvanian research broker Buckshire Corporation when the entertainment industry lost interest in him. His life during this time is not discussed much.

In 1998, Oliver was released to Primarily Primates due to his declining eyesight, atrophied muscles from years spent in a lab cage, and many strokes. Oliver was arthritic and toothless yet accomplished the remarkable feat of walking straight out of the lab cage.

He met Raisin, a female chimpanzee who would soon become his friend, thanks to the cautious assistance of veterinarian Valerie Kirk and the director of Primarily Primates. Filmmaker Andy Cockrum built the two hammocks by hand, placing one close to the ground so Oliver could discover it.

Oliver could share a space with Sarah, a chimpanzee owned by a language study facility for a long time. Sarah offered grapes to Oliver, who accepted them, realizing that the elder ape had vision problems.

Early in June 2012, Andy's handcrafted hammock contained a lifeless Oliver. Raisin saw Oliver through his last moments.

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Russian Scientist Tried to Create Human-Chimp Hybrid

Oliver's passing sparked further curiosity about this chimpanzee's true nature. However, Primarily Primates has consistently turned down requests from the media and from experts on primates to film or collect samples from Oliver, and this was not going to change. In the same way, scientific tourists were not permitted to view the ape's remains.

Meanwhile, Russian biologist Ilya Ivanovich, born in 1870, accomplished remarkable success in his field of study- artificial insemination- as an adult. Astonishingly, the scientist and the horse can inseminate 500 mares using the semen of a single stallion, according to reports.

Ivanov's method involved obtaining animal sperm and introducing it into several species to observe the effects.

He began cautiously, creating a rat-mouse (self-explanatory), a guinea pig-mouse, a zedonk (from a zebra and a donkey), and some abomination formed from an antelope and a cow.

Then, in 1910, he expressed to a group of zoologists his belief that it may be feasible to produce a human-ape hybrid, which is now commonly known as a "humanzee."

His opportunity finally presented as he worked at the Institut Pasteur following the 1917 Russian Revolution. He was allowed to work on the hybridization plan of his dreams here in 1924. The man, the last person you want around chimpanzees, was informed that he may visit any facility in what was then referred to as French Guinea.

However, Ivanovich was banished during a separate government purge of scientists and passed away shortly after, bereft of any monkey-man abilities.

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