Photo of Natalya Malyarchuk (IMAGE) University of Tyumen Caption Photo of Natalya Malyarchuk Credit Source: the official site of Tyumen State University Usage Restrictions Source: the official site of Tyumen State University 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.