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100 Years Ago: Engineering a City--New York Citys Bridges

Scientific American - Posted: November 21st, 2008, 12:00am EST

pDECEMBER 1958EVOLUTION OF BEHAVIOR--ensp;ldquo;But is it not possible that beneath all the variations of individual behavior there lies an inner structure of inherited behavior which characterizes all the members of a given species, genus or larger taxonomic group--just as the skeleton of a primordial ancestor characterizes the form and structure of all mammals today? Yes, it is possible! Let me give an example which, while seemingly trivial, has a bearing on this question. Anyone who has watched a dog scratch its jaw or a bird preen its head feathers can attest to the fact that they do so in the same way. A bird also scratches with a hind limb (that is, its claw), and in doing so it lowers its wing and reaches its claw forward in front of its shoulder. One might think that it would be simpler for the bird to move its claw directly to its head without moving its wing, which lies folded out of the way on its back. I do not see how to explain this clumsy action unless we admit that it is inborn. --Konrad Z. Lorenzrdquo;/p a href=http://www.sciam.com/article.cfm?id=100-years-ago-engineering-a-city[More]/a

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