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Dr. Yuri Dublyansky of Innsbruck University studies ancient cave art from the Ural Mountains in Russia to help better understand their age and how humans have evolved from thousands of years ago.
Два естественных входа в пещеру Идрисовскую, открывающиеся в скале над рекой Юрюзань.
Two natural entrances to the Idrisovskaya cave, opening up in 100 m above the river Yuryuzan.
Photo ID: R.Shone_170921_016
Robbie Shone