Professors and undergraduate students of the China University of Geosciences pose for a group photo with professors and students of the University of the Aegean during a field course at the Petrified Forest in Sigri of Lesvos, Greece, Aug. 18, 2016. The School of Earth Sciences of the China University of Geosciences started field education on the Greek island of Lesvos in cooperation with the Department of Geography of the University of the Aegean. (Xinhua/Anthi Pazianou)
