Experts at the Indian Institute of Technology have resolved the mystery behind the 16,00-year-old iron pillar in Delhi, which has never corroded despite the Capital's harsh weather. Metallurgists at
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/iit-kanpur-team-solves-mystery-delhis-iron-pillar
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi