Hogans (pr: ho-GAHNS) are a common sight on the sprawling Navajo Nation. These small, distinctive six- or eight-sided homes are redolent of long tradition. Yet in many places on the reservation hogans and other houses are in disrepair. Crumbling foundations, broken windows, poor heating, and inadequate insulation aren?t unusual. A high poverty rate makes it difficult for residents to upgrade these structures. Recently the Stardust Center for Affordable Homes at Arizona State University has been working to bring hogans into the twenty-first century. ASU architecture students collaborated in designing and building an energy-efficient, hogan-inspired house for an elderly couple.