@hiddenbrainshow: What makes extraordinarily generous people different from the rest of us? Neuroscientist Abigail Marsh is fascinated by this question. She benefited from the courage of one such person after her car stalled out on an interstate many years ago. A stranger ran across six lanes of traffic in the dark to save her life. She has spent many years since then studying the minds of people like him.

Hidden Brain

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Saturday 17 October 2026 18:28:34 GMT