Scientists are puzzled by the body of an 18,000-year-old puppy that was found frozen in the ground in Siberia. In spite of careful testing, scientists still can't tell if the animal is a dog or a wolf.
Scientists are puzzled by the body of an 18,000-year-old puppy that was found frozen in the ground in Siberia. In spite of careful testing, scientists still can't tell if the animal is a dog or a wolf.
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