Photo taken on March 3, 2016 shows scientists exploring a huge doline in Donglan County, Hechi City of south China's Guangxi Zhuang Autonomous Region. Scientists from China and France have discovered a rare huge doline in Guangxi, the local publicity department said Sunday. The 420-meter deep doline, or sink hole, was among a number discovered by scientists during an eight-day expedition that began on Feb. 26 in Donglan County. Many species live in these dolines, including bats and snakes. Scientists also found some as-yet unidentified vertebrates and plants. (Xinhua)
