TIL that horses went extinct in North America about 10,000 years ago. They were then reintroduced to the continent by the Spanish as early as the 1550s.
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American Horses ~ Horses in North America: A Comeback Story | Blog | Nature | PBS
https://www.pbs.org/wnet/nature/blog/american-horses-horses-in-north-america-a-comeback-story/
Ancient horses roamed the North American continent for millions of years. And many, many years later, horses played an integral role in building the