NATIONAL SPELEOLOGICAL SOCIETY
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There is some question within the society about which chapter originated the motto which most use. Some credit the Pittsburgh Grotto (chapter) but most credit the Baltimore Grotto (chapter).
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The National Speleological Society (NSS) is an organization formed in 1941 to advance the exploration, conservation, study, and understanding of caves in the United States. Originally headquartered in Washington D.C., its current offices are in Huntsville, Alabama. The organization engages in the research and scientific study, restoration, exploration, and protection of caves. It has more than 10,000 members in more than 250 grottos.