Why do you have an appendix? Or wisdom teeth? Or something called a coccyx? Since the days of Darwin, numerous scientists and educators have argued that “useless” or “vestigial” organs prove the theory of evolution. These organs, they say, are like leftover scaffolding that had previously performed vital functions in mankind’s “pre-human ancestors.” They just haven’t evolved their way into oblivion quite yet.
“Organs or parts … bearing the plain stamp of inutility are extremely common, or even general, throughout nature,” Darwin explained in On the Origin of Species. “It would be impossible to name one of the higher animals in which some part or other is not in a rudimentary condition.” His prime examples: the appendix and the coccyx (tailbone).