That would make a really large habitat space if it could be sealed and
pressurized.
Maybe we could send a robotic spelunking machine to explore it? :-)
In any case, it might be a first chance to get samples from deeper in the
Moon, which has got to have some big science value?
--Paul Fernhout
http://www.pdfernhout.net/
http://www.beyondajoblessrecovery.org/