The Silver Age of Comic Books lasted approximately from the late 1950's to the early 1970's. During this period, a few attributes of comic book characters started to develop. One of the most interesting developments was the incorporation of science fiction into the storylines. With science fiction at the helm, you could inject a myriad of stories. The stretching of known boundaries put a new spin on tales. Whereas, the scenes usually took place with normal circumstances, now the writer's and artists were given free rein. The lack of limitations produced many out of the ordinary comic books.