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Episode Synopsis

Why do the “constants of nature” — masses of subatomic particles and strengths of forces like gravity and electromagnetism — have the values they do? Does fine-tuning “cry out” for explanation?

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Episode Segments

1. Bernard Carr

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2. Luke Barnes

3. Geraint Lewis

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4. George F. R. Ellis

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5. Abraham Loeb

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What's Fine-Tuning in Physics?

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