Prions, Parents, Food Markets and the Heroin Market

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Roz Chast with her parents

On today's show: Nobel Prize-winning neurologist Stanley B. Prusiner talks about how he discovered prions, the infectious proteins in the brain that are responsible for scrapie and mad cow disease. Cartoonist Roz Chast describes her experience caring for her ailing parents. Dan Pashman, host of The Sporkful podcast, talks eating strategy at Smorgasburg, Brooklyn's outdoor summer food market. And we’ll find out why New York City has become a hub for the booming heroin trade.