The latest research into the link between germs and mental illness -- and what we all need to know.
Billy Collins, the new U.S. Poet Laureate, joins Diane to read from his latest poetry collection and to talk about his plans for his tenure as poet laureate.
- Billy Collins U.S. Poet Laureate 2001 to 2003. He is a Distinguished Professor of English at City University of New York, where he has taught for the past 30 years.
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