Build a model device to keep astronauts safe on Mars! Include sensors to measure heart rate, temperature, detect toxic gases, and monitor position, and outputs like buzzers, LEDs, and an OLED display for warnings about dangerous situations. Complete instructions including a parts list, circuit diagram, and example code are available on our website: https://www.sciencebuddies.org/science-fair-projects/project-ideas/SpaceEx_p053/space-exploration/astronaut-mars-geofencing?ytid=iqtQ8Ikq-Ew&ytsrc=description