scientist-claims-us-lab-engineered-humanzee-human-chimp-hybrid-100-years-ago

https://www.sciencealert.com/scientist-claims-us-lab-engineered-humanzee-human-chimp-hybrid-100-years-ago-gallup-yerkes-oliver ,

https://en.wikipedia.org/wiki/Ilya_Ivanovich_Ivanov#Human-ape_hybridization_experiments ,

https://allthatsinteresting.com/humanzee ,

https://en.wikipedia.org/wiki/Humanzee#Reports_of_attempted_hybridization