Vietnam
02/21/2017
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By Tracey Watson
Mysterious sinkholes are plaguing Vietnam
Subsidence, which is defined as the gradual caving in or sinking of an area of land, has been causing mysterious holes to appear all over the Cho Don District of the northern mountain province of Bac Kan, Vietnam. At least 20 holes have been reported so far, and scientists are gravely concerned. Each of the […]
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