A scientific analysis proved that they are a left lower jaw and second cervical vertebra of an arctic whale.

The lower jaw is some 70 kg in weight and 2.27 meters in length and the cervical vertebra weighs some 18 kg in weight and is 40 cm high and 52 cm wide. It is believed that when alive, the whale was some 100 tons in weight and 18-18.5 meters in length.

Dr. and Associate Prof. Won Chol Guk, a department chief of Kim Il Sung University, told KCNA the fact that such mammoth vertebrates as arctic whale had lived in the East Sea of Korea some 10,000 years ago was of significance in studying the evolution of marine vertebrates and ecological environment at that time.

It is the first time that such large fossil whale bones were discovered in Korea.