Thanks to evolution, humans have a number of anatomical structures that today have little or no use. Along with vestigial features such as wisdom teeth and the tail bone—which are thought to hearken back to a time when our ancestors consumed lots of raw plants and balanced with their tails—there are also vestigial reflexes. One example is goose bumps, which would raise our fur, if we still had it, and make us seem more menacing. What purpose might the appendix, long considered vestigial, serve? Discuss