This investigation uses three sources of information - images from space, a relief map, and a road map - to analyze the spatial distribution of human settlements. Students will use a nighttime image of the northeastern U.S. to reinforce spatial concepts, put together an 8-piece puzzle of the night lights of the entire U.S. to answer questions on spatial distribution, and use a topographic map of an unidentified region of Earth to determine areas suitable for settlement. The concepts of pattern, dispersion and density are discussed throughout. The URL opens to the investigation directory, with links to teacher and student materials, lesson extensions, resources, teaching tips, and assessment strategies. As the first investigation in this module entitled, "Mars and Earth-the Quest for Life," the teacher's guide begins with a two-page module overview and list of all standards addressed. Note that this is investigation one of four found in the Grades 5-8 Module 2 of Mission Geography. The Mission Geography curriculum integrates data and images from NASA missions with the National Geography Standards. Each of the four investigations in Module 2, while related, can be done independently.