It is the world’s most common farm animal as well as humanity’s largest single source of animal protein. Some 24 billion strong, it outnumbers all other birds by an order of magnitude. Yet for 2 centuries, biologists have struggled to explain how the chicken became the chicken.
https://www.sciencemag.org/news/2020/06/chicken-first-crossed-road-southeast-asia-landmark-gene-study-finds
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