It turns out there's no such things as wild horses — at least, if you want to get technical about it.
That's according to a study published in the journal Science. Researchers tested Przewalski's horse DNA and compared the sequences to that of ancient horses.
Most biologists thought Przewalski's horses, which are native to central Asia, were the only remaining truly wild horses on Earth. But the DNA test showed they're just feral descendants of early domesticated horses from more than 5,000 years ago.
So true wild horses went extinct a long time ago. But Przewalski's horse has come back from the brink of extinction thanks to conservation efforts — so it's got that going for it.
