Their origins are not a mystery, they were dragged here by Europeans just like every other horse in the Americas
Wikipedia has a good article on them: https://en.wikipedia.org/wiki/Banker_horse
The mistery is they don’t know which European ship brought them there and when. There are multiple options.
Isn’t that true of most wild horses in the Americas though? I can’t imagine anyone has pedigree info for feral animals, or at least not that far back
Which still always amuses me, as horses originated in the Americas and lived there until about 12,000 years ago, went extinct there, and then got brought back by humans.
I think they added the mystery as clickbait, the articles states a few times they must have come from Europe somehow and then conclude with this: “Researchers use genetic studies in hopes of unraveling the mystery, contributing to a deeper understanding of their history and genetic lineage. Each study adds pieces to a historical puzzle that has fascinated experts for decades.”
I can’t imagine experts really being fascinated by this ‘mystery’.
When one horse loves another horse a whole lot…
MAN