The book states that nature having invented life protects it too. As living creatures multiplied life became more competitive.One gets the impression that nature has accepted the use of stiff materials rather reluctantly, but as animals got bigger and came to land, most of them developed and explored rigid skeletons, teeth, horns and armour, yet animals never became predominantly rigid devices like modern machinery.

  Benjamin Franklin defines man ‘a tool-making animal’, but for man to make strong structures without the use of strong metals required an instinct for the distribution and direction of stress, so till the invention of Fibreglass and other artificial composites, man has been returning to a sort of fibrous non-metallic structures. Between 1000-2000 BC there was no difference among most artificial structures, because metals were scarce, expensive and not easy to shape then. During all these centuries till the invention of strong....