 Someday we may not need currency -- or even banks -- in order to buy, sell and pay for things. That's the radical promise of a world powered by cryptocurrencies like Bitcoin and Ethereum. We're not there yet, but in this sparky talk, digital currency researcher Neha Narula reveals our shared, collective fiction of money -- and paints a picture of its fascinating future. Watch »  "We're not in a clean energy revolution; we're in a clean energy crisis," says climate policy expert Michael Shellenberger. His surprising solution: nuclear. In this passionate talk, he makes a case for overcoming our longstanding fear of nukes, and shows why he and other environmentalists believe it's past time to embrace nuclear as a viable and desirable source of clean power. Hear his case, and decide if you agree ... Watch » |  Architecture is more than a clever arrangement of bricks. Michael Murphy and his team at MASS look far beyond the blueprint when they're designing, considering factors from airflow to light, in a holistic approach that produces community as well as (beautiful) buildings. He takes us on a tour of projects in countries such as Rwanda and Haiti, and reveals a moving, ambitious plan for The Memorial to Peace and Justice, which he hopes will heal hearts in the American South. Watch »  Why do some people do selfless things, helping other people even at risk to their own well-being? Psychology researcher Abigail Marsh studies the motivations of people who do extremely altruistic acts, like donating a kidney to a complete stranger. Are their brains just different? Watch » | |
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