New Scientist has an article on a forgotten Russian experiment to produce an ape/man mix.
In November, Ivanov returned to Guinea, captured his chimps and with considerable difficulty eventually inseminated three of them. By now, he had a second experiment in mind: to inseminate women with chimp sperm. Knowing that no local woman would agree, he planned to do this under the pretext of a medical examination, but the French governor forbade it.
None of the three chimps conceived. Disappointed, Ivanov headed home with 20 chimps to stock a new ape nursery in the subtropical Soviet republic of Abkhazia. He knew now that his best chance of creating his hybrid was to find Soviet women willing to carry half-ape babies in the interests of science. In the event, only four chimps made it to Abkhazia and so while the nursery set about acquiring more apes, Ivanov looked for volunteers.
At least five women volunteered. But although the nursery did get hold of an assortment of apes, they never flourished, and by the time Ivanov was ready to proceed the only adult male left was Tarzan, a 26-year-old orang-utan. Ivanov pressed on until fate dealt his project a fatal blow. Tarzan had a brain haemorrhage. "The orang has died, we are looking for a replacement," Ivanov cabled the woman he had lined up to receive Tarzan's sperm. More chimps arrived in 1930 - but Ivanov fell victim to the widespread purge of scientists and was exiled to Kazakhstan. He was released the next year but died soon after.
Read the entire article here.