It it our thumbs, or the fact we kiss, or that we reason and use tools, or something else that makes the human experience unique? A science journalist who’s pondered this question for years joins Kojo to explore what brain scanning and other cutting edge research is teaching us about the origin of human traits like trust, humor, affection, and more.


  • Chip Walter science journalist; author Thumbs, Toes, and Tears: And Other Traits That Make Us Human (Walker & Company)

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