Evolution's "vestigial organ" argument debunked How many have been taught in school about our body's supposed "vestigial organs"? The standard definition of a vestigial organ is a body part that was once useful in a species' ancestral past but has now become virtually useless. Evolutionists have used the vestigial-organ argument for decades to show the supposed evolution of animal and human bodies. They claimed that vestigial or diminishingly useful organs, which Charles Darwin called rudimentary, proved that bodies had evolved from more primitive forms. However, research has shown the supposed vestigial organs or structures of the human body—such as...