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Here's the lineup for this week.
Politics and Genes


We all know that our surroundings can influence our political leanings, but could our DNA also affect the way we vote? Our guest today discusses that possibility.


Science of Food


Why do we cook? No other animals do. But we're meticulous about it -- roasting, fileting, whisking. What does science tell us about why we're like this, why we care, and how food sets humans apart as a species?