Vestigial organs have long been one of the classic arguments used as evidence for evolution. The argument goes like this: living organisms, including man, contain organs that were once functional in our evolutionary past, but that are now useless or have reduced function. This is considered by many to be compelling evidence for evolution. More importantly, vestigial organs are considered by some evolutionists to be evidence against creation because they reason a perfect Creator would not make useless organs.
I just know this much about vestigial organs, maybe I helped you:))