Aug 19, 2026 06:10 PM
(This post was last modified: Aug 19, 2026 06:12 PM by C C.)
https://www.popsci.com/science/human-chimpanzee-hybrid/
EXCERPTS: The controversial work began in French Guinea, now the independent nation of Guinea, according to research from Alexander Etkind, a science historian currently teaching at Central European University. In 1926, Ilya Ivanov visited the country with his son to catch several live adult chimpanzees. He then inseminated female chimpanzees with human sperm.
At one point, Ivanov also wanted to inseminate local women with ape sperm without their consent, under the guise of medical examinations at the community hospital, but he was blocked by French colonial authorities.
None of Ivanov’s experiments succeeded, and he returned to the Soviet Union with 20 chimpanzees in tow, though only four survived the trip. From a primate “nursery” near the Black Sea, Ivanov set out to recruit five consenting women for insemination with ape sperm under authorization from Soviet officials. By the time he identified the volunteers, there was only one ape left—an orangutan—and the experiment never proceeded.
In 1930, Ivanov was arrested and exiled on political charges unrelated to his experiments, and his attempts at interspecific hybridization ceased.
For scientists like James Mallet, an evolutionary biologist and expert on interspecific hybridization at Harvard University, Ivanov’s attempts at creating a “humanzee” are profoundly unethical.
“It’s a horrible thing to do to a human when you know it’s liable to cause problems for the offspring,” Mallet tells Popular Science. “People should be free to have the children they want and not be forced into it by scientists. I mean, that seems obvious to me.”
Mallet says that a human-chimp hybrid is theoretically possible but highly unlikely, given the roughly 6 million years of evolutionary divergence between the species.
[...] But why is a human-chimp hybrid so unlikely? Species are often separated by reproductive barriers that prevent mating or fertilization. If they do mate, different species can create offspring that are infertile or unable to survive. A dog can’t have babies with a cat, for example, and an elephant can’t cross-breed with a mouse.
But those barriers aren’t always absolute. [...] lions have been crossed with tigers to create “ligers.” Famously, Neanderthals mated with Homo sapiens tens of thousands of years ago before they disappeared. Today, many living humans carry a small amount of Neanderthal DNA.
[...] “It’s true that many hybrids are poorly adapted, but if you look at their genomes, you’ll find that there’s evidence of successful hybridization in many species,” Mallet says... (MORE - details)
EXCERPTS: The controversial work began in French Guinea, now the independent nation of Guinea, according to research from Alexander Etkind, a science historian currently teaching at Central European University. In 1926, Ilya Ivanov visited the country with his son to catch several live adult chimpanzees. He then inseminated female chimpanzees with human sperm.
At one point, Ivanov also wanted to inseminate local women with ape sperm without their consent, under the guise of medical examinations at the community hospital, but he was blocked by French colonial authorities.
None of Ivanov’s experiments succeeded, and he returned to the Soviet Union with 20 chimpanzees in tow, though only four survived the trip. From a primate “nursery” near the Black Sea, Ivanov set out to recruit five consenting women for insemination with ape sperm under authorization from Soviet officials. By the time he identified the volunteers, there was only one ape left—an orangutan—and the experiment never proceeded.
In 1930, Ivanov was arrested and exiled on political charges unrelated to his experiments, and his attempts at interspecific hybridization ceased.
For scientists like James Mallet, an evolutionary biologist and expert on interspecific hybridization at Harvard University, Ivanov’s attempts at creating a “humanzee” are profoundly unethical.
“It’s a horrible thing to do to a human when you know it’s liable to cause problems for the offspring,” Mallet tells Popular Science. “People should be free to have the children they want and not be forced into it by scientists. I mean, that seems obvious to me.”
Mallet says that a human-chimp hybrid is theoretically possible but highly unlikely, given the roughly 6 million years of evolutionary divergence between the species.
[...] But why is a human-chimp hybrid so unlikely? Species are often separated by reproductive barriers that prevent mating or fertilization. If they do mate, different species can create offspring that are infertile or unable to survive. A dog can’t have babies with a cat, for example, and an elephant can’t cross-breed with a mouse.
But those barriers aren’t always absolute. [...] lions have been crossed with tigers to create “ligers.” Famously, Neanderthals mated with Homo sapiens tens of thousands of years ago before they disappeared. Today, many living humans carry a small amount of Neanderthal DNA.
[...] “It’s true that many hybrids are poorly adapted, but if you look at their genomes, you’ll find that there’s evidence of successful hybridization in many species,” Mallet says... (MORE - details)