Videos

Watch the leaders of physics wrestle with the riddles of their subject.

  • An Interview with Yakir Aharonov [Video]

    In 1959 physicists Yakir Aharonov and David Bohm startled their colleagues by predicting a new type of quantum nonlocality, distinct from the phenomenon that had spooked Einstein. They showed that an electric or magnetic field can have an effect on a particle at a distance: even when the field exerts no force on that particle, […]

  • An Interview with Nicolas Gisin [Video]

    The great mystery of quantum mechanics is that particles can be connected without a connector. They can coordinate their behavior in ways that are too complicated to be preprogrammed into them, even though no process is acting across the distance between them. “We can’t say that one thing led to another,” Nicolas Gisin of the […]

  • Morphing from Spacelessness to Space [Video]

    Could space as we know it be just one possible phase of the universe, able to undergo a transition to or from an entirely alien structure? This video animation shows how that might happen, according to a model known as quantum graphity, developed by theoretical physicists Tomasz Konopka, Fotini Markopoulou, Lee Smolin, and others. (The […]

  • Einstein’s Bubble Paradox [Video]

    “This onslaught came down on us as a bolt from the blue,” recalled Léon Rosenfeld, a young colleague of the physicist Niels Bohr. They were shocked, shocked, by Einstein’s famous 1935 critique of their interpretation of quantum mechanics. But why the surprise? Einstein’s argument did not originate in 1935 or even with his storied confrontation […]

  • An Interview with Juan Maldacena [Video]

    The holographic principle is arguably the most tangible and tantalizing clue to a quantum theory of gravity, but for years physicists didn’t know what to make of it. That changed in 1997 when Juan Maldacena, now at the Institute for Advanced Study, came up with the first concrete example of what the principle means and […]

  • An Interview with Ted Jacobson [Video]

    Some of the most interesting conversations I’ve had in my life have been with Ted Jacobson, a theoretical physicist at the University of Maryland. A musician, an amateur baker, and co-creator of loop quantum gravity, he is deeply self-reflective—a man who always questions his own thinking, who used to criticize string theory but then came […]

  • An Interview with Joe Polchinski [Video]

    Joe Polchinski, based at the Kavli Institute for Theoretical Physics in Santa Barbara, is one of the world’s leading string theorists and an avid cyclist. (Many colleagues have challenged him to a race, to their later chagrin.) He is best known for showing that string theory isn’t just about strings—it predicts a huge diversity of […]

  • An Interview with Steve Giddings [Video]

    One of the scientists I follow in my book is Steve Giddings, a theoretical physicist at U.C. Santa Barbara who is also a highly skilled mountain-climber. In this video, he explains how quantum mechanics, when applied to black holes, calls the principle of locality into question and suggests that spacetime is not a fundamental ingredient […]

  • What Would It Mean for Time to Come to an End? [Video]

    Could time come to an end? What would that even mean? In April 2013 I gave a talk about this strange physics idea at a TEDx event in Trento, Italy, based on a Scientific American article I wrote in 2010. My conceit was that time’s end poses a paradox that might be resolved if time […]

  • George and John’s Excellent Adventures in Quantum Entanglement, Part 2 [Video]

    The first time I ever saw quantum entanglement for myself was in August 2011 on a road trip to Colgate University. Goodness knows how many blog posts and magazine articles have been written about the quantum realm, invariably describing it as weird. But I’d never actually seen this supposed mind-blowingness with my own eyes, which […]

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