From the bits and pieces that I can remember from Star Trek, a lot of the common dieases and other malodies of our reality now have cures like the common cold, radiation poisoning, etc....so why are their still male pattern bald men walking around during the Trek era? We have all these cures for "real" and fatal diseases, yet there's no cure for baldness, Kirk and Chekov's toupees aside of course. I've always wondered about that...