Stretching 17 miles around, a mammoth machine that straddles the Swiss-Franco border will soon start launching the biggest experiments ever attempted in high-energy physics.

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A home run is one of the biggest crowd-pleasers in baseball. A physicist, physics teacher and pitching coach talk about the physics behind a home run, a 90-mile-per-hour fastball and other baseball feats.

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Journalist Walter Isaacson discusses his new biography of Albert Einstein and historians' recent, more nuanced views of the scientist's life and achievements.

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