Pictures: Guatemala Sinkhole Adds to World's Famous Pits

Guatemala Sinkhole, 2010Heavy rains from tropical storm Agatha likely triggered the collapse of a huge sinkhole in Guatemala on Sunday, seen above a few days afterward. In the strictly geologic use of the word, a sinkhole happens when water erodes solid bedrock, carving an underground cavity that can then collapse. Many parts of the United States are at risk for that type of event. The Guatemala s

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Pictures: Guatemala Sinkhole Adds to World's Famous Pits