Most longevity research focuses on food and fitness, but this week's guest makes the case for deepening relationships, practicing kindness and staying optimistic if we want to live longer, happier, and healthier. Marta Zaraska, a renowned science journalist and author of the book, Growing Young: How Friendship, Optimism, and Kindness Can Help You Live to 100, sheds light on the fascinating research that suggests cuddles, laughs, and selfless acts, might be the most accurate predictors of our longevity.

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