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
Read More