In this issue, you'll learn what heart cells generated from your blood can tell you about your risk for disease. You’ll hear how Egyptian and Tunisian youths hacked the Arab Spring. You’ll learn how artist David Hockney is trying to capture the experience of seeing. You’ll hear how a virtual medium of exchange could be a real alternative to government-issued money. And you'll learn how online services have set content free from the physical world's constraints.
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