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" Since natural selection requires a function to select, an irreducibly complex biological system, if there is such a thing, would have to arise as an integrated unit for natural selection to have anything to act on. "

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" Although Darwin was able to persuade much of the world that a modern eye could be produced gradually from a much simpler structure, he did not even attempt to explain how the simple light sensitive spot that was his starting point actually worked. "

Michael Behe

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" The basic structure of proteins is quite simple: they are formed by hooking together in a chain discrete subunits called amino acids. "

" It is a shock to us in the twentieth century to discover, from observations science has made, that the fundamental mechanisms of life cannot be ascribed to natural selection, and therefore were designed. But we must deal with our shock as best we can and go on. "

Michael Behe

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" The theory of undirected evolution is already dead, but the work of science continues. "

" A man from a primitive culture who sees an automobile might guess that it was powered by the wind or by an antelope hidden under the car, but when he opens up the hood and sees the engine he immediately realizes that it was designed. "

" Proteins are the machinery of living tissue that builds the structures and carries out the chemical reactions necessary for life. "

" The point here is that physics followed the data where it seemed to lead, even though some thought the model gave aid and comfort to religion. "

" In Darwin's time all of biology was a black box: not only the cell, or the eye, or digestion, or immunity, but every biological structure and function because, ultimately, no one could explain how biological processes occurred. "

" It is often said that science must avoid any conclusions which smack of the supernatural. "

" Skin is made in large measure of a protein called collagen. "

" In many biological structures proteins are simply components of larger molecular machines. "

" The question of how the eye works - that is, what happens when a photon of light first impinges on the retina - simply could not be answered at that time. "

" As can be seen even by this limited number of examples proteins carry out amazingly diverse functions. "

" Science is not a game in which arbitrary rules are used to decide what explanations are to be permitted. "

" But sequence comparisons simply can't account for the development of complex biochemical systems any more than Darwin's comparison of simple and complex eyes told him how vision worked. "

" Thus it seemed to Haeckel that such simple life could easily be produced from inanimate material. "

" We are not inferring design to account for a black box, but to account for an open box. "

" It was only about sixty years ago that the expansion of the universe was first observed. "

" By irreducibly complex I mean a single system composed of several well-matched, interacting parts that contribute to the basic function, wherein the removal of any one of the parts causes the system to effectively cease functioning. "

" It was a shock to people of the nineteenth century when they discovered, from observations science had made, that many features of the biological world could be ascribed to the elegant principle of natural selection. "

" In order to say that some function is understood, every relevant step in the process must be elucidated. "

" Biology has progressed tremendously due to the model that Darwin put forth. But the black boxes Darwin accepted are now being opened, and our view of the world is again being shaken. "

" Throughout history there have been many other examples, similar to that of Haeckel, Huxley and the cell, where a key piece of a particular scientific puzzle was beyond the understanding of the age. "

" In the 19th century the anatomy of the eye was known in great detail and the sophisticated mechanisms it employs to deliver an accurate picture of the outside world astounded everyone who was familiar with them. "