Siberian Dog Skull (2 of 2) (IMAGE) University of Arizona Caption The 33,000-year-old skull of a domesticated dog was extraordinarily well preserved in the Razboinichya cave in the Altai Mountains of Siberia. Credit Nikolai D. Ovodov Usage Restrictions This visual may only be used in conjunction with reporting/posting of this news release. Image/video credit must be included exactly as indicated. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.