(BBC NEWS) Researchers are trying to determine whether an 18,000-year-old puppy found in Siberia is a dog or a wolf.
The canine - which was two months old when it died - has been remarkably preserved in the permafrost of the Russian region, with its fur, nose and teeth all intact.
DNA sequencing has been unable to determine the species.
Advertisement - story continues below
Scientists say that could mean the specimen represents an evolutionary link between wolves and modern dogs.