"Is there something about nature that points to an element of design?" asks Dr. Behe. By way of answer, Behe presents to his audience the idea of Irreducible Complexity. That is, certain biological systems are composed of a variety of parts in such a way that if one part were removed, the system would no longer function. Pointing to systems such as the bacterial flagellum and human vision, Behe maintains that the presence of irreducible complexity is a strong argument for design. In this talk Behe goes beyond an explanation of Irreducible Complexity — which may already be familiar to some — to discuss larger questions of biological design, and what he calls "the undisciplined imagination" upon which grand Darwinian claims rest.