Written in 2008, this short article provides a great overview in layman’s terms of why our magnificent wild horses are a reintroduced native species to North America. Dr. Jay Kirkpatrick, researcher of reproductive physiology and developer of the groundbreaking PZP fertility control vaccine, along with Dr. Patricia Fazio, researcher of equid evolution, outline facts that simply don’t change: Equus Caballus, the modern horse, originated and evolved here in North America and therefore must be a native species.

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