China's market turmoil reverberates worldwide. More than 100 people die this week in Europe's ongoing migrant crisis. And the new U.S. envoy for Syria pushes for a political solution to the civil war. A panel of journalists joins Diane for analysis of the week's top international news stories.
Of all our senses, the sense of smell is most closely tied to mental health and happiness. It was the first of our senses to evolve, yet it often takes a cultural backseat to sight and sound. An expert on smell talks about the psychology, biology and sociology of our olfactory sense.
- Rachel Herz visiting professor at the Department of Psychology at Brown University.
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