During the winter it's really nice to think about a beach and all that sun. Of course the easiest way to cook yourself on the beach is to be there on a cloudy day. You say, "I don't feel a thing." But let me tell you by experience, the rays are still burning you. That's actually what happened in the tragic aftermath of that meltdown of a nuclear facility in Chernobyl in Russia a few years ago. Remember, thousands of children were invaded by invisible radiation and they didn't feel a thing. But after awhile they began to lose hair and their skin began to change. They got increasingly deadly symptoms, and finally many of them died. They were gradually destroyed by something they couldn't even feel.