An experimental conservation effort for dinosaur footprints in Yanqing Geopark in Beijing, Oct. 15, 2018. Experts from the Petrified Forest of Lesbos in Greece, China University of Geosciences (Beijing) and Yanqing Geopark are launching a new round of experimental conservation efforts for the dinosaur footprints formed about 150 million years ago and now suffering from erosion and weathering. (Photo/Xinhua)
Fossilized dinosaur footprints at Yanqing Geopark in Beijing, Oct. 15, 2018. Experts from the Petrified Forest of Lesbos in Greece, China University of Geosciences (Beijing) and Yanqing Geopark are launching a new round of experimental conservation efforts for the dinosaur footprints formed about 150 million years ago and now suffering from erosion and weathering. (Photo/Xinhua)
Photos taken on Oct. 15, 2018 show experts trying to repair rock to prevent further damage to dinosaur footprints in Yanqing Geopark in Beijing. Experts from the Petrified Forest of Lesbos in Greece, China University of Geosciences (Beijing) and Yanqing Geopark are launching a new round of experimental conservation efforts for the dinosaur footprints formed about 150 million years ago and now suffering from erosion and weathering. (Photo/Xinhua)
An experimental conservation effort for dinosaur footprints in Yanqing Geopark in Beijing, Oct. 15, 2018. Experts from the Petrified Forest of Lesbos in Greece, China University of Geosciences (Beijing) and Yanqing Geopark are launching a new round of experimental conservation efforts for the dinosaur footprints formed about 150 million years ago and now suffering from erosion and weathering. (Photo/Xinhua)
An experimental conservation effort for dinosaur footprints in Yanqing Geopark in Beijing, Oct. 15, 2018. Experts from the Petrified Forest of Lesbos in Greece, China University of Geosciences (Beijing) and Yanqing Geopark are launching a new round of experimental conservation efforts for the dinosaur footprints formed about 150 million years ago and now suffering from erosion and weathering. (Photo/Xinhua)
An experimental conservation effort for dinosaur footprints in Yanqing Geopark in Beijing, Oct. 15, 2018. Experts from the Petrified Forest of Lesbos in Greece, China University of Geosciences (Beijing) and Yanqing Geopark are launching a new round of experimental conservation efforts for the dinosaur footprints formed about 150 million years ago and now suffering from erosion and weathering. (Photo/Xinhua)
An experimental conservation effort for dinosaur footprints in Yanqing Geopark in Beijing, Oct. 15, 2018. Experts from the Petrified Forest of Lesbos in Greece, China University of Geosciences (Beijing) and Yanqing Geopark are launching a new round of experimental conservation efforts for the dinosaur footprints formed about 150 million years ago and now suffering from erosion and weathering. (Photo/Xinhua)
