Anthropology Team 7, log file 132 – Dr. Tzu – Tue, Oct 17th 593, 03:17

It appears that the Dwarves are a bit paranoid, as these fortifications guarding their realm seem nigh impregnable and have even succeeded in keeping us out. Their secrets and technology will remain a mystery for now. There must be another way in, because it defies common sense that so many endothermic creatures can live off the oxygen from one single, albeit large, entrance.