In the ongoing effort to establish a permanent lunar base where humans can live and work on the moon, scientists have ...

A lot of science can be gathered underground, much of it contained in speleothems—mineral deposits called stalagmites and stalactites that rise from cave floors and descend from the ceilings.

One of Kentucky's most awe-inspiring attractions is Mammoth Cave National Park, which promises unique above and underground adventures and wows hundreds of thousands of visitors year after year.

The umbrella leaks at places called sinkholes, from which surface water makes its way underground, eroding the limestone into a honeycomb of caverns. Mammoth, the world's longest known cave system ...

In the end, we whittled down the list. The 2nd article that we opted to run is titled: Life Underground (Author: Elizabeth Licata) In 1858, a tunnel was blasted out of solid rock by Birdsill Holly ...