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Studies show that the horse was first domesticated in Kazakhstan. This horse skull, discovered in the north byu professor Victor Zaibert in 1986, shows the wear of a bridle on the teeth. Carbon-14 testing puts it ace at 5,000 years. Thousands of additional articfacts found over a 15 year excavation period at Botai settlement site along the iman-Burluk river in the Atyrausky district further substantiate this fact. North Kazakhstan Regional Historical museum, Petropavl.