By Poonam Binayak, CNN (CNN) — Can an iron structure stand tall for 1,600 years without rusting, despite being exposed to the elements? It seems implausible, considering the supposed lack of technology at the time of its construction. Yet, inside New Delhi’s UNESCO-listed Qutb Minar complex – a collection of historic monuments and buildings built Read this story at KTVZ , KEYT , KIFI
