Twenty million Chinese have their residences in caves, but that is often not a bad deal, according to a December McClatchy Newspapers dispatch from Miaogou Village. In addition to the obvious advantages (e.g., no mortgage), some caves have been in the family for generations and have electrical wiring, plumbing and cable television, and some are part of communities of connected caves. Researchers said that earthen insulation keeps the inside temperature from dropping below about 55 degrees Fahrenheit even in the dead of winter. [McClatchy Newspapers, 12-16-08]