It is unclear exactly when horses were first ridden because early domestication did not create noticeable physical changes in the horse. However, there is strong circumstantial evidence that horse were ridden by people of the Botai culture during the copper age, circa 3600-3100 BCE. The earliest evidence suggesting horses were ridden dates to about 3500 BCE, where evidence from horse skulls found at site in Kazakhstan indicated that they had worn some type of bit. Wear facets of 3 mm or more were found on seven horse premolars in two sites, Botai and Kozhai 1, dated about 3500–3000 BCE. It is theorized that people herding animals first rode horses for this purpose, presumably bareback, and probably used soft materials such as rope or possibly bone to create rudimentary bridles and hackamores. However, the earliest definitive evidence of horses being ridden dates to art and textual evidence dating to about 2000-1500 BCE.
- "WHAT WE THEORIZE - WHEN AND WHERE DOMESTICATION OCCURRED". International Museum of the Horse. Retrieved 14 October 2015.
- Anthony, David W.; Telegin, Dimitri; Brown, Dorcas (1991). "The origin of horseback riding". Scientific American. 265 (6): 94–100. doi:10.1038/scientificamerican1291-94.
- Anthony, David W.; Brown, Dorcas (2000). "Eneolithic horse exploitation in the Eurasian steppes: diet, ritual and riding". Antiquity. 74: 75–86.
- "THE SOFT BIT AND BRIDLE". International Museum of the Horse. Retrieved 14 October 2015.
- "EARLY ATTEMPTS AT RIDING: OVERVIEW". International Museum of the Horse.
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