Undated file photo provided by Qinglong Wu of Nanjing Normal University shows the terrace consisting of outburst flood sediments in west Guanting Basin, east to the outlet of the Jishi Gorge, in northwest China's Qinghai Province. Scientists have found what could be geological evidence of a legendary flood tied to the establishment of the first dynasty in China, Xia, and even the beginning of Chinese civilization, a study published in the U.S. journal Science said Thursday. In the new study, Qinglong Wu and colleagues reported geological evidence for a catastrophic flood on the Yellow River about 4,000 years ago, including remains of a landslide dam and dammed lake sediments. (Photo/Xinhua)
