Greek experts preserve dinosaur tracks in Beijing

Photo shows a fossil preservation expert from Greece, working on a dinosaur footprint in the Beijing suburb of Yanqing, October 15, 2018. Experts from China and Greece have started joint preservation work on fossilized dinosaur footprints in Yangqing to prevent them from weather damage. The footprints are believed to have been left by dinosaurs some 150 million years ago. [Photo: Xinhua]