One of the truly universal secret desires that all of us share is to beat our ancient, implacable enemy, Time. We all have private dreams of being the only possessor of the secret of eternal life, or that the doctor will come rushing into the hospital room just as we are muttering our immortal last words, hollering: "Hold everything! I hate to interrupt, but they have just perfected the serum that guarantees eternal life. It will cure all known diseases and make you eternally 21 years old! I have the first dose here! Great Scott, I'm just in time!" . . .