"He was. Assistant Professor of Electronics at Columbia, before the Signal Corps persuaded him to become a Space Cadet." My face was red then. "Well, on the military nature of our mission we have just a few more wrinkles to iron out," the Captain went on, "but something else has come up that we think has a lot more significance than guided missiles." "I told the Captain I thought you'd help us," Yogi said, "because of what you said about secret projects a while ago." Now I _am_ confused. So I don't like so much secrecy, so they think I can help their project? I don't get it. I don't get it at all. "Yogi will explain the science part," the Captain said. "I'm just a publicity man myself, not a teacher. But as a publicity man, Peters, I think we can use you. Would you be game to try a job that could be very important?" I nodded, still confused but willing. Yogi started by explaining that Lunette came into existence about a hundred million years ago, a figure the geologists came up with by measuring the radioactivity of the uranium here and comparing it with that of uranium on Earth. "But, in studying the radioactivity of the elements here," he said, "we have discovered something else ... something that could change the whole picture of things back on Earth. We found out about it, at least a glimmer of it, almost as soon as we got up here, but we wanted to run a whole slew of experiments before we let ourselves believe that it was true. "Say, Tuck, what's that bandage on your hand for?" * * * * * I was surprised at his sudden change of subject, but I told him how I had burned my hand on the spotweld machine the night before. "Does it hurt now?" "Heck, it ain't nothing, Yogi. Let's get on with my physics lesson." "Do me a favor, please. Take off the bandage." He was real serious, so I unwound the bandage the nurse put on. There was just a tiny white scar where the burn had been. It looked like I had done it at least a couple of weeks ago! Yogi and the Captain looked at each other and grinned like they were real proud of something. "That's part of the lesson, Tuck. Our big discovery is that the increased radioactivity of the elements here on Lunette seems to have a miraculous healing power on any infectious or communicable disease, and on any injury to body tissues. Maybe you remember reading a little about the strange effect that the Bikini tests had on some of the animals used experimentally." I nodded. Yogi continued. "We don't know yet just how this radioactivity works on the body. In fact, we're not even sure it is the radioactivity alone. There may be some added effect from the Lunette climate or water. But we have proved, to the satisfaction of everyone here, that almost all Earth diseases and most injuries can be cured on Lunette.