In this episode of Discovery Matters, new research using the Swedish Twin Registry reveals that genetics may account for up to 50% of intrinsic lifespan, far more than previously thought. Associate Professor Sara Hegg (Karolinska Institutet) explains what heritability really means, why earlier models underestimated genetics, and what this does (and doesn’t) mean for lifestyle, biohacking, and aging interventions. The result: a more nuanced view of how biology, chance, and choice shape how long we live.
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