Lawrence Krauss isn't only a famous physicist; he's also the subject, along with Richard Dawkins, of the documentary film "The Unbelievers." He tells Steve Paulson that science has replaced philosophy and religion as the place to deal with the Big Questions.
Intelligent. Optimistic. Curious.
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Laney Salisbury talks about the 1925 dogsled relay that brought diphtheria anti-serum to ice-bound Nome, Alaska which was facing an epidemic in the dead of winter. Dogsleds were the only way in and the whole nation followed their perilous journey by telegraph.
Mira Nair is an Oscar nominated, India- born film-maker who divides her time between America and the sub-continent.
So, what is gender anyhow? Philosopher Judith Butler has been unpacking our notions of "he," "she" and "we" for the past 20 years. She stopped in to help us take stock of the state of gender in the North America.
Three physicists just won the Nobel Prize for their discovery that the universe is rapidly expanding.
Some of the country's leading neuro-biologists are collaborating with Buddhist monks in an effort to understand the effects of meditation on the mind and the brain.
Mark Headley talks about his book, "Blown for Good: Behind the Iron Curtain of Scientology."
Australian Les Murray is considered by many literary critics to be the greatest living poet in English today.
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