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by 082349872349872 2072 days ago
In a much more recent, much smaller gap, horses originated in North America but died out there, only to be later reintroduced from the Old World.

https://en.wikipedia.org/wiki/Evolution_of_the_horse

> "The evolution of the horse, a mammal of the family Equidae, occurred over a geologic time scale of 50 million years, ... Much of this evolution took place in North America, where horses originated but became extinct about 10,000 years ago."