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A cave collapse is a severe and often sudden geological hazard caused by the failure of a roof or wall arch, where massive rocks and debris fall and can block entire passages. Rockfalls are ...

William Floyd Collins, a renowned cave explorer, entered Sand Cave in Kentucky on 30 January 1925 with a single kerosene lamp ...

An explorer of the Mammoth Cave system in Kentucky who died 100 years ago is credited with the creation of the national park. A national park in Kentucky has the longest known cave system in the world ...