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That iron pillar just stood tall and solitary, seemingly defiant with humanity’s discovery intelligence, and the sky is also a symbol of ancient Indian civilization. Outdated technology creates extraordinary miracles. But in the end, the experts of the Indian Institute of Technology IIT have also decoded the mystery that makes the longevity of the Delhi iron pillar. Observed through a microscope, they discovered an extremely thin “coat” covering the entire surface of this pillar. Sampling for the study, the composition of the shell was determined to be a compound of iron, oxygen and hydrogen. It is this compound that prevents the iron metal of the column from coming into contact with the air. As a result, a corrosive reaction due to a chemical reaction cannot occur, making the iron column immortal. Girl book a reader lives a thousand lives poster. Radioisotope analysis also showed that this protective layer began to form about three years after the iron column was fabricated, meaning that their lifespan is equivalent to that of the pillar. During those more than a millennium, they continuously thickened over the years at a very slow rate. After 1,600 years, up to now, this crust has only reached a thickness of about 1/20 millimeter.
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