Charles Darwin was the first to articulate this notion, but it survives, a true vestige, among his modern advocates.
Yet another evolutionary icon has fallen to the data.
Darwin-defenders like Karl Giberson have used the rare phenomenon of babies born with supposed “tails” as evidence for common descent.
Prominent medical researchers on the “human tail” now see it as “a disturbance in the development of the embryo” not “a regression in the evolutionary process.”
Karl Giberson wants us to think that true tails are some kind of a regression to an earlier form.