Proteins are the machinery of living tissue that builds the structures and carries out the chemical reactions necessary for life.
From Michael Behe
This fact immediately suggested a singular event - that at some time in the distant past the universe began expanding from an extremely small size. To many people this inference was loaded with overtones of a supernatural event - the creation, the beginning of the universe.
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.
Thus it seemed to Haeckel that such simple life could easily be produced from inanimate material.
As can be seen even by this limited number of examples proteins carry out amazingly diverse functions.
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.
The theory of undirected evolution is already dead, but the work of science continues.
We are not inferring design to account for a black box, but to account for an open box.
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.
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