Sean Carroll

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    • The Biggest Ideas in the Universe | 3. Force, Energy, and Action April 7, 2020
      Welcome to the third installment in our video series, The Biggest Ideas in the Universe. Today’s idea is actually three ideas: Force, Energy and Action. There is a compelling argument to be made for splitting these up — and the resulting video … Continue reading →Related Posts:The Biggest Ideas in the Universe: IntroductionThe Biggest Ideas in the […]
    • The Biggest Ideas in the Universe | 2. Change March 31, 2020
      Welcome to the second installment in our video series, The Biggest Ideas in the Universe. Today’s idea is Change. This sounds like a big and rather vague topic, and it is, but I’m actually using the label to sneak in … Continue reading →Related Posts:The Biggest Ideas in the Universe | 1. ConservationThe Biggest Ideas […]
    • The Biggest Ideas in the Universe | 1. Conservation March 24, 2020
      We kick off our informal video series on The Biggest Ideas in the Universe with one of my favorites — Conservation, as in “conservation of momentum,” “conservation of energy,” things like that. Readers of The Big Picture will recognize this … Continue reading →Related Posts:The Biggest Ideas in the Universe | 2. ChangeThe Biggest Ideas […]
    • The Biggest Ideas in the Universe: Introduction March 20, 2020
      So, how about all that social distancing due to the growing pandemic, eh? There is a lot more staying-at-home these days than we’re normally used to, and I think it’s important to keep our brains active as well as our … Continue reading →Related Posts:Intro to Cosmology VideosHelp Wanted: Moving Naturalism ForwardUser-Friendly Naturalism Videos
    • Thanksgiving November 28, 2019
      This year we give thanks for space. (We’ve previously given thanks for the Standard Model Lagrangian, Hubble’s Law, the Spin-Statistics Theorem, conservation of momentum, effective field theory, the error bar, gauge symmetry, Landauer’s Principle, the Fourier Transform, Riemannian Geometry, the … Continue reading →Related Posts:Why Can't We Visualize More Than Three Dimensions?Why 10 or 11?How […]
    • The Notorious Delayed-Choice Quantum Eraser September 21, 2019
      Note: It is in the nature of book-writing that sometimes you write things that don’t end up appearing in the final book. I had a few such examples for Something Deeply Hidden, my book on quantum mechanics, Many-Worlds, and emergent … Continue reading →Related Posts:From Eternity to Book Club: Chapter ElevenEverything You Ever Wanted to […]
    • Spacetime and Geometry: Now at Cambridge University Press July 8, 2019
      Hard to believe it’s been 15 years since the publication of Spacetime and Geometry: An Introduction to General Relativity, my graduate-level textbook on everyone’s favorite theory of gravititation. The book has become quite popular, being used as a text in … Continue reading →Related Posts:Wasn't the truth good enough?Speaking of shameless self-promotionGuest Post: Marc Sher […]
    • True Facts About Cosmology (or, Misconceptions Skewered) January 12, 2019
      I talked a bit on Twitter last night about the Past Hypothesis and the low entropy of the early universe. Responses reminded me that there are still some significant misconceptions about the universe (and the state of our knowledge thereof) … Continue reading →Related Posts:MisconceptionsMisunderconceptionatedAgainst Bounces
    • Thanksgiving November 22, 2018
      This year we give thanks for an historically influential set of celestial bodies, the moons of Jupiter. (We’ve previously given thanks for the Standard Model Lagrangian, Hubble’s Law, the Spin-Statistics Theorem, conservation of momentum, effective field theory, the error bar, … Continue reading →Related Posts:SednaElsewhereHelp Populate the (Solar System’s) Underworld
    • Atiyah and the Fine-Structure Constant September 25, 2018
      Sir Michael Atiyah, one of the world’s greatest living mathematicians, has proposed a derivation of α, the fine-structure constant of quantum electrodynamics. A preprint is here. The math here is not my forte, but from the theoretical-physics point of view, … Continue reading →Related Posts:Raoul Bott, 1923-2005The Fine Structure Constant is Probably ConstantHow Quantum Field […]