In December 1988, two sets of identical twins became test subjects in a study for which they had never volunteered. It was an experiment that could never be performed in a lab, and had never before been documented. This week, we revisit this fascinating story, told by psychologist Nancy Segal, about the eternal tug between nature and nurture in shaping who we are.

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What Twins Tell Us

Shankar Vedantam uses science and storytelling to reveal the unconscious patterns that drive human behavior, shape our choices and direct our relationships.

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We've all had those days when all we want is a little treat. Maybe it's a bag of chips, an ice cream sundae or a glass of wine. But sometimes, these desires become all-consuming. This week on the show, psychiatrist Judson Brewer helps us understand the science of cravings, and how we should respond to them.

The Curious Science of Cravings

Anthropologist Tom Pearson was devastated after his daughter Michaela was diagnosed with Down syndrome. When he began to examine that emotional response, he found himself wrestling with questions that have roiled his field for decades. Early anthropologists would often compare people of different backgrounds and abilities, asking questions like: How is one group different from another? Which one is stronger or smarter? And how do we understand people who don’t fit our expectations? This week, we talk with Pearson about his family’s story, and the evolution of our thinking on disability and difference.

What Is Normal?

If you've ever taken an economics class, you were probably taught that people are rational. But about 50 years ago, the psychologists Daniel Kahneman and Amos Tversky began to chip away at this basic assumption. In doing so, they transformed our understanding of human behavior. This week, we remember Kahneman, who recently died at the age of 90, by revisiting our 2018 and 2021 conversations with him.

The Transformative Ideas of Daniel Kahneman

Have you ever sat across from your spouse, colleague or friend and realized that while they may be hearing what you're saying, they aren't actually listening? Poor listening can lead to arguments, hurt feelings, and fractured relationships. But the good news is that active, thoughtful listening can profoundly benefit both people in the conversation. This week on the show, psychologist Guy Itzchakov helps us understand where interactions go awry, and how to become a more attentive listener.

Are You Listening?

Many of us believe we know how we’d choose to die. We have a sense of how we’d respond to a diagnosis of an incurable illness. This week, we revisit a 2019 episode featuring one family’s decades-long conversation about dying. What they found is that the people we are when death is far in the distance may not be the people we become when death is near.

What Twins Tell Us

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