Luna's family is heading to the top of Pike's Peak. When they get there they are surprised to find that many normal activities are more tiring and it feels a bit harder to breathe at the top of the mountain. Could there be something different about mountain air? What's happening here? They've just gotta know! Educational Objective: Discover what is different about the air at high altitudes and why it can feel harder to breathe at the top of a mountain.