Here's another article on the possibility of underground lunar settlements:
http://www.gizmag.com/lunar-lava-tubes/36639/ Lee Skinner
_______________________________________________ Texascavers mailing list | http://texascavers.com Texascavers@texascavers.com | Archives: http://www.mail-archive.com/texascavers@texascavers.com/ http://lists.texascavers.com/listinfo/texascavers