In 1959, Russian geneticist Dmitry Belyayev set up a selective breeding program intended to replicate the wolf-to-dog domestication process -- this time, with foxes. The experiment took place -- and still continues -- at the Institute of Cytology and Genetics in Novosibirsk, Russia, where researchers assigned a population of red foxes to different categories based on their behavior toward experimenters. Those considered the most friendly and tame were bred together, while the most aggressive were also bred together separately. Researchers observed behavioral and physiological changes in later generations of the former group, including seeking out human attention, sniffing and licking...
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