Nobel prizewinner Bob Lefkowitz tells the story of an extraordinary group of young physicians chosen to work at the National Institutes of Health during the Vietnam War. Their brief time there transformed medical research and saved millions of lives.

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When a Chinese doctor changed the genes of two baby girls he thought he’d be acclaimed. Instead, his experimental treatment alarmed scientists and ethicists around the world.

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Jacqueline Novogratz has recognized the need among the poor for something more than just money: dignity. Employing a new kind of capitalism, her company, Acumen, has invested $128 million to build more than 128 social enterprises across Africa, Latin America, South Asia, and the United States. These companies have leveraged an additional $611 million and brought basic, critical services like affordable education, health care, clean water, energy and sanitation to more than 300 million people.

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The physicist and best-selling author argues that “the mind of God” can be found in “a symphony of strings – cosmic music resonating through hyperspace.”

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Her breakthrough discovery of a gene that doubles the lifespan of a tiny worm offers the possibility of extending the lifespan of people.

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Paul Rudd and Alan Alda talk acting, from being spontaneous and "in the moment," to odd ways to learn lines.

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She finds justice among the bones. Like helping to convict the genocidal murderers of Kosovo. And, she's just been made a Baroness!

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Don’t feel bad about taking the elevator instead of the stairs. Blame evolution for not preparing you for voluntary physical activity. But, says anthropologist Dan Lieberman, there are ways to make exercise rewarding as well as healthy.

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Studying the lifestyle of hunter-gatherers has led to the surprising discovery that dieting simply to lose weight misses the real benefits of cutting calories.

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The wonderful Helen Mirren is as honest and searching in conversation as she is in the rich characters she’s brought to us in performance after performance. She’s just as thoughtful and fun as you’d expect her to be.

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