Scientists have discovered Ningxia's largest group of sauropod dinosaur footprint fossils in the Liupan Mountains. Over 241 well-preserved footprints dating back 110 million years were discovered on a cliff. #CoolChina

Scientists have discovered Ningxia's largest group of sauropod dinosaur footprint fossils in the Liupan Mountains. Over 241 well-preserved footprints dating back 110 million years were discovered on a cliff. #CoolChina

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