Modern technologies are more advanced than what people used in the past, aren’t they? They didn’t have lasers that cut through metal with precision just by typing some formulas into a computer! But that begs the question – how on Earth did ancient engineers create some amazing technological and architectural wonders? 

For example, one of the most mysterious human-made objects can be found at an ancient temple in Delhi, India. It’s almost 24 feet tall and 99.5% pure iron. The strange thing about the pillar is that it hasn’t rusted over the last 16 centuries! Or have you ever heard about the Baghdad Battery? This thing conducted an electric current 2000 years before Alessandro Volta introduced to the world the first version of the modern battery we have today! 

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