‘Pre-contact’ American dogs, which arrived alongside people over 10,000 years ago and dispersed throughout North and South America, possessed genetic signatures unlike dogs found anywhere else in the world. Illustration by John James Audubon and John Bachman (1845-1848). - Oxford, England 
New World’s First Dogs Came from Siberia: Study
Domestic dogs first appear in the archaeological record of the Americas 9,900 years ago, nearly 6,000 years after the earliest evidence of human activity.
However, the precise timing of their arrival as well as their associated geographic origins are not well understood.
To investigate in unprecedented detail the origins of ‘pre-contact’ American dogs — domesticated dogs that populated the Americas prior to the 15th century arrival of Europeans, University of Oxford’s Professor Greger Larson and colleagues combined archaeology with genomic analysis.
The scientists sequenced 71 mitochondrial and seven nuclear genomes from ancient North American and Siberian dogs.
They found that pre-contact dogs stem from a genetically distinct lineage, most closely related to a 9,000-year-old ancient breed of sled dogs from Eastern Siberia.
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