When I asked Doctor Craxton what an appendix is and what it’s good for, he wasn’t sure. “It has absolutely no purpose,” he said. How could it be, I wondered, thinking that God didn’t create anything without a purpose, but the doctor just shrugged his shoulders. “That’s the way it is with appendix.” Then, complying with my request, he drew it on a piece of paper. It looked like a curled worm.