Scientists both in India and abroad began studying the iron pillar in Delhi in 1912 to try to figure out why it hadn’t corroded. It wasn’t until 2003 that experts at the Indian Institute of ...

The well-known iron pillar near the Kutub Minar, Delhi, and the rectangular iron beams of the temple at Puri, to which the dates 640 A.D.–1174 A.D. have been ascribed, are cited as examples of ...