In Praise of Copper, a Gift from Nature

Alfred Russell Wallace, aluminum, ambient temperatures, conductors, copper, corrosion, crustal rocks, ductility, Earth’s crust, electrical devices, fire, Fire-Maker series, fitness, fortuity, gold, Intelligent Design, iron, lead, machinery, mantle, metallurgy, metals, rocks, silver, steam engine, Stone Age
If the conductivity of copper were ten times less, wires would have to be ten times the cross-sectional area to provide the same conductivity. Source
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For a Technological Civilization, We Must Have Metals

ambient temperatures, atmosphere, beams, copper, ductility, earth, electric age, electric generators, electric motors, electrical conductivity, electrical power, electricity, fire, Fire-Maker series, girders, industrial society, Intelligent Design, Maya, metals, respiration, steel, Technology, tensile strength
It is very doubtful that any beings in the universe could develop a civilization remotely comparable with our own without the use of metals. Source
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