Gus Frederick with the Oregon Public Education Network has come up with a fascinating idea that ties into the Millennium Mars Project, a project supported by NASA and the U.S. Department of Education. The goal of this project is to design a viable Martian colony. Participants are further required to produce a visual representation of their design. Gus took this idea a step further and built a small-scale working model of such a colony using mice rather than people. His “Controlled Ecological Mouse Support System” (CEMSS) is a self-contained system, designed to fully support a mouse for one-week “mouse missions.” An important part of the system is a set of sensors used to monitor temperature, carbon dioxide gas, oxygen gas, pH, and relative humidity. Gus is using LabPro, Logger Pro software, and Vernier sensors to make these measurements. He has developed an excellent website at