Last summer, a Russian man was strolling along the shore of the local Tirekhtyakh River in Yakutia when he came upon a grisly sight: the severed head of an ancient wolf. The head had been well preserved by the permafrost and still sported a full head of hair and sharp fangs.
Scientists dated it to over 40,000 years ago, or the end of the Pleistocene epoch. Their analysis also revealed that the wolf was fully grown and was between 2 and 4 years old when it died. The severed head is 16 inches (40 centimeters) long. That’s about half the size of a modern wolf’s body.