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.
From Michael Behe
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.
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.
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.
In many biological structures proteins are simply components of larger molecular machines.
In order to say that some function is understood, every relevant step in the process must be elucidated.
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.
Science is not a game in which arbitrary rules are used to decide what explanations are to be permitted.
The basic structure of proteins is quite simple: they are formed by hooking together in a chain discrete subunits called amino acids.
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.
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