For those of you not in the know, an “Earworm” is not some kind of parasite but rather refers to that fragment of a song that gets stuck in your head to repeat over and over again. Research indicates that when we hear songs with a certain cyclic or repeating melody, that our own brains get stuck in a loop until something manages to disrupt the repetition. Mark Twain once wrote a story called “A Literary Nightmare” in which the only way to get rid of a jingle stuck in one’s head was to pass it on to someone else. Hopefully this week’s cartoon has not infected you. If it has, the only cure is to pass it on to someone else – so get cracking!