This photo taken on March 20, 2024 shows coral fossils found in Yunxi County, central China's Hubei Province. Researchers have found a large number of coral fossils dating back to some 350 million years ago in Yunxi County, central China's Hubei Province, which suggests that the Qinling Mountains were once a vast sea back then. (Hubei provincial academy of geological sciences/Handout via Xinhua)
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