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Hard to believe it’s been 15 years since the publication of Spacetime and Geometry: An Introduction to General Relativity, my graduate- ..read more
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I talked a bit on Twitter last night about the Past Hypothesis and the low entropy of the early universe. Responses reminded me that ..read more
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This year we give thanks for an historically influential set of celestial bodies, the moons of Jupiter. (We’ve previously given thanks ..read more
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Sir Michael Atiyah, one of the world’s greatest living mathematicians, has proposed a derivation of α, the fine-structure constant of ..read more
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