An iron pillar placed in the UNESCO-listed Qutub Minar complex in New Delhi has long fascinated scientists for surviving over ...

Qutub Minar, a wonder of architecture in Delhi, is the tallest minaret made of bricks in the world. Its imposing height has weathered centuries, but its path to completion was not without hiccups.

Qutub Minar’s 1,600-year-old iron pillar remains rust-free due to high phosphorus content and ancient forge-welding ...