A tale of one minute and 58 seconds Rohan Khatwani, a ninth-grader from Thar, arranges periodic table in shortest time KARACHI: It was February and the chill of a frigid winter that had gripped Pakistan for weeks had started to abate. But Rohan Khatwani, the son of a Hindu shopkeeper and a ninth-grade student from Mithi - a city in the dry, arid, sandy and largely downtrodden region of Thar - found the weather cold enough in Islamabad to sport a jacket. Yet, his palms were sweaty. The day had arrived. It was February 13, 2021 and he was at the Islamabad Science Festival at the Pakistan National Council for Arts.