Unknown are the reasons why early man searched for useful materials. Was it sheer necessity, such as better protection against the inclemencies of the weather, was it accidental observations, or just the impulse to toy around? Man took what was available: Wood for lumber and fire, stones for tools and construction, animal and vegetable fibers for clothing, amber for jewelry, asphalt as adhesive. Next came the tinkerers who wanted to improve old things or create new ones, not very systematically though and often with wrong ideas, but occasionally successful. And finally science, trying to explain the multitude of phenomena and to order them in systems with less and less assumptions, and then technology which converts these insights into useful applications.
KeywordsZinc Sugar Clay Petroleum Transportation
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