The discovery resulted from a fact-finding trip undertaken by the Institute of Archeology, the Vietnam Archeology Association, and the Bac Kan Museum.
Combing the entire cave, their team found traces of ancient people almost everywhere. Among the artefacts discovered were stone tools made from river pebbles.
According to Associate Professor, Dr Trinh Nang Chung, based on the overall study of the relics as well as the structure and age of the sediment, researchers believe that Tham Un was a residence of many generations of prehistoric people.
Its early inhabitants belonged to the late Bac Son Culture dating back 5,000 to 6,000 years, while the late inhabitants were from the Late Neolithic - Early Metal Ages dating back about 4,000 years.
This is a very important prehistoric relic cave, Chung stated.
Archaeologists are planning to excavate the site in the near future
