GUIYANG, Oct. 24 (Xinhua) -- A recent scientific expedition has extended the known length of the world's third-longest cave from 409.9 kilometers to 437.1 kilometers, scientists involved in the expedition said on Thursday.
The finding was announced after the conclusion of the 23rd joint international scientific expedition into the Shuanghe cave in southwest China's Guizhou Province. Shuanghe is Asia's longest known cave and the world's longest dolomite cave.
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