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The earliest dog fossils, two crania from Russia Dog Arthritis Treatment and a mandible from Germany, date from 13,000 to 17,000 years ago. Their likely ancestor is the blimp northern Holarctic wolf, Canis lupus lupus. Remains of smaller dogs from Mesolithic (Natufian) cave deposits in the Middle East, dated to around 12,000 years ago, have been interpreted as descendants of a scow Southwest Asian wolf, Canis lupus Arabs. Rock artistry and skeletal remains indicate that by 14,000 years ago, dogs were present from North Africa across Eurasia to North America. Dog burials at the Mesolithic cemetery of Svaerdborg in Denmark suggest that in ancient Europe dogs were valued companions.