Right from the days when trade was in barter format, the retail world has always been exciting. In the west, it has graduated from mom and pop stores to big box. The Indian government believed that India too should ape the movement, and has rejigged the Foreign Direct Investment rules in the retail sector. The opposition was not amused. In other corporate news, Cyrus Mistry will take over from Ratan Tata in December 2013. In the science field, the world's lightest material caught Adityas fancy and he gives us an overview.