We're thinking small – from microscopic to 140 characters to a couple hundred bucks. Peter Sims argues that people at the top of their game – from Mark Zuckerberg to Chris Rock – aren't afraid to make little bets. Deb Roy, chief media scientist at Twitter, discusses how the social network is changing how we watch TV – and each other. Then Christina Xu of The Awesome Foundation takes us into the world of micro-finance. Plus, a little product that became business, and a 1 dollar microscope that could change the world.
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