Przewalski's horse, 'the last wild horse', may not be wild at all. Genetics links it to the horses of Kazakhstan's Botai culture, kept by people 5,500 years ago, so it is probably feral.

3500 BC

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• The horses of the Botai culturec. 3500 BC · Northern Kazakhstan. Around 3500 BC the Botai people kept horses: their settlements hold vast numbers of horse bones, dung-filled pens and pots with traces of mare's milk. Genetics suggests that Przewalski's horses, long thought the last truly wild horses, descend from Botai stock.

35th century BC

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