Exaptations, like adaptations, are fitness-enhancing characteristics, but, according to Stephen Jay Gould, their purposes were appropriated as the species evolved. This can be for one of two reasons: either the trait’s original function was no longer necessary so the trait took on a new purpose or a trait that does not arise for a certain purpose, but later becomes important.[6] Typically exaptations have a specific shape and design which becomes the space for a new function.[6] The foundation of this argument comes from the low-lying position of the larynx in humans.[7] Other mammals have this same positioning of the larynx, but no other species has acquired language.