AWARENESS IGNITES ACTION. âAs an educator in the field of microfinance, it is rare to find those opportunities that can bring your students closer to the action before they join the professional world. âI felt that my Human Connections internship this summer was designed specially for me. This experience has transformed me as a person.
Karst Cave, China. Photograph by Raymond Gehman. Looking like the set of a science fiction movie, China's Reed Flute Cave is bathed in purple-blue light. Created by an underground river more than a half million years ago, this highly accessible karst formation is one of the region's most popular tourist attractions.
Caves and their features form when rainwater follows the cracks or joints in the rock material, usually limestone or dolomite. The rainwater combined with carbon dioxide forms a weak acid called carbonic acid. This weak acid once in contact with the limestone begins to dissolve the limestone. This process slowly creates larger and larger crack and joints.