New Delhi’s Iron Pillar has long fascinated scientists both at home and abroad. But it wasn’t until 2003 that experts cracked the metallurgical mystery behind this unusual attraction.

The Iron Pillar of Delhi, India : Pillar is 7.21m high with a 41cm diameter that stands in the middle of an empty square in the Qutub Complex, New Delhi, India. Its construction was ordered by ...

Construction worker impaled by two iron rods, one inches from heart, miraculously survives By Melanie Dadourian Fox News Published January 19, 2018 9:59am EST | Updated January 19, 2018 10:24am EST ...

New Delhi’s Iron Pillar has long fascinated scientists both at home and abroad. But it wasn’t until 2003 that experts cracked the metallurgical mystery behind this unusual attraction.

Visitors to the courtyard of the complex’s Quwwat-ul-Islam Mosque will immediately spot an imposing 7.2-meter, six-ton iron pillar with a decorative top that’s even older than the complex.

Typically, iron and iron alloy structures exposed to the air or moisture oxidize over time, rendering them coated in rust unless they are protected, like the Eiffel Tower, by layers of special paint.