While the research concludes that the ancestors of our beloved pets probably lived in Central Asia, the idea that domesticated dogs could have walked to Central Asia (à la Homeward Bound) is not being ruled out either.
If you're wondering how the scientists lured the dogs to get to their precious DNA, your gut instinct is on point: food. Adam R. Boyko at Cornell University says that "...the great thing about working with dogs is that if you show up with food you don’t usually have trouble recruiting subjects... we showed up in Puerto Rico at a fishing village and the dogs turned up their noses at roast beef sandwiches."
This directly clashes with the prior accepted theory that dogs originally came from Europe.
Still, no word yet on why exactly Chihuahuas (or, really, any dog under 10 pounds) actually exists.
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Jeremy Glass is a writer for Thrillist and all he knows is all dogs go to heaven.