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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By Design, Earth Is a Planet Fit for Fire

ambient conditions, atmosphere, atmospheric pressure, civilization, combustion, Douglas Drysdale, earth, Edward McHale, fire, fire spread, fire sustainability, Fire-Maker series, gases, gravity, Intelligent Design, mankind, metabolism, metals, Mount Everest, NASA, nitrogen, oxidative metabolism, oxygen, Physics, Earth & Space, respiration, Stone Age, Technology
As we have seen so far in this series, fire was an absolutely crucial component in humanity’s rise to civilization and technology. Source
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