Ancient DNA Analysis Uncovers Deep Bond Between Dogs and Humans Dating Back 15,000 Years
New research published in the journal Nature has revealed that the enduring bond between dogs and humans stretches back more than 15,000 years, pushing the oldest genetic evidence for domestic dogs back by a staggering 5,000 years. This groundbreaking study indicates that hunter-gatherers were not only feeding dogs but also providing them with ritual burials long before the advent of agriculture.
Oldest Specimens Found in Turkey and Somerset
The oldest specimen, dating to 15,800 years old, was discovered buried alongside human remains in Anatolia, Turkey. The second-oldest on record, a jawbone replica from 14,300 years ago, was unearthed at Gough’s Cave in Somerset, a site inhabited by a tribe known for cannibalistic rituals. Dr Lachie Scarsbrook, co-first author of the study from Ludwig Maximilian University of Munich, stated, "This means that by 15,000 years ago, dogs with very different ancestries already existed across Eurasia, from Somerset to Siberia. This raises the possibility that domestication occurred during the last ice age, more than 10,000 years before the appearance of any other domestic plants or animals."
Overcoming Historical Mysteries with Advanced Techniques
Previously, archaeological evidence suggested dogs were domesticated from grey wolves before the end of the last ice age, about 12,000 years ago. However, the oldest direct genetic evidence only dated to 10,900 years due to fragmented DNA making it difficult to distinguish between dogs and wolves. Dr Anders Bergström, lecturer at the University of East Anglia, explained, "For a long time the only way we could tell whether something was a dog or wolf was to look at the bones, which is not necessarily so reliable." The latest findings, involving advanced sequencing techniques, have allowed scientists to reconstruct whole genomes from tiny DNA fragments, providing clearcut species identification for the first time.
Widespread Presence and Deep Emotional Bonds
The research shows that dogs were already widespread across Europe and western Asia by at least 14,000 years ago. Isotopic analysis of bones from Turkey revealed dogs consumed a diet rich in fish, matching the local human diet, suggesting they were purposefully fed. Evidence of deep emotional bonds includes the burial of three puppies over the legs of a human in Pınarbaşı, Turkey, mirroring elaborate human burials. At Gough’s Cave, the dog jawbone had holes intentionally carved, possibly indicating that pet dogs were also eaten after death, reflecting complex cultural practices.
Genetic Relationships and Practical Purposes
The close genetic relationship between dogs across sites in the UK, Turkey, and Serbia suggests that once domesticated, dogs may have spread rapidly across Europe, possibly being traded between unrelated groups. Prof Laurent Frantz, a senior author from Ludwig Maximilian University of Munich, noted, "The fact that people exchanged dogs so early means these animals must have been important. They must’ve served some purpose beyond being pets." Dogs likely increased hunting efficiency or served as an early warning system against predators, rather than being kept solely for companionship.
Implications for Modern Dog Breeds
The study also reveals that modern European dog breeds, from bulldogs to labradors, share much of their ancestry with dogs living alongside ancient hunter-gatherers in Europe. These early dogs likely resembled small wolves, with shorter muzzles and less powerful jaws, as Dr Scarsbrook remarked, "We don’t expect them to look like a chihuahua." This research provides unprecedented detail on how our ancient partnership with dogs took root, reshaping our understanding of animal domestication and human history.
