This week, Pratik Nahata talks to the Zoo from Bangalore, India, where social and mobile are beginning to alter politics and business, entertainment and family life. In the recent elections, for example, parties found new ways to engage young voters through Twitter and Facebook. Instead of straw and exit polls, news outlets watched hashtags and mentions to see who's tracking. In retail, businesses are connecting with customers through mobile apps, even offering steep discounts if you buy from a smartphone. And more people communicate with friends and family through WhatsApp, the $19 billion mobile messaging app Facebook just acquired, because it is free.