St. Petersburg: Zhanna and Yana, 21, taught me the Russian word for 'hair bangs': челка. These twins from the town of Oryol were walking down Nevsky dressed in the same dog-print shirt, rayban sunglasses and New Balance sneakers. Dressing alike is 'their thing' and one of them described themselves as 'one whole.' The twins both study chemistry and plan to work in their profession. I asked how they chose that subject. Their mom teaches chemistry at school.