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The Last Theory

Mark Jeffery
The Last Theory
Latest episode

85 episodes

  • The Last Theory

    There are no rules in science

    21/08/2026 | 20 mins.
    I’m forever hearing that there are rules in science.
    If a theory breaks the rules, I’m told, it must be rejected.
    Trouble is, if, in the past, we’d rejected any theory that breaks the rules, we’d have rejected Copernicus’s idea that the Earth goes around the Sun, Galileo’s observation that there are mountains on the Moon, Newton’s laws of motion, Einstein’s theories of relativity, quantum mechanics – we’d definitely have rejected quantum mechanics – we’d have rejected everyimportant theory in the history of science.
    Truth is, every rule for science you’ve ever been taught is wrong.
    There are no rules in science.
    So... you may be wondering... if there are no rules, how do you know the difference between a good scientific theory and... nonsense?

    Well, that’s simple.
    There’s a formula for a good scientific theory.
    This 7-word formula has worked for every significant discovery in the history of science.
    And I’m willing to bet that you’ve never heard of it.

    References:
    Thales of Miletus
    Thales’ eclipse
    Galileo Galilei
    Galileo’s mathematics quotation
    Johannes Kepler
    Isaac Newton
    Werner Heisenberg
    Max Born
    Wolfgang Pauli
    Erwin Schrödinger
    Paul Dirac
    String Theory
    Overfitting
    Stephen Wolfram
    Jonathan Gorard
    The Wolfram Physics Project
    Credits:
    Jupiter and Moons through a 10” lx200 telescope by Jan Sandberg, enhanced by Google Gemini, reproduced with permission: “The copyright holder of this file allows anyone to use it for any purpose, provided that the copyright holder is properly attributed. Redistribution, derivative work, commercial use, and all other use is permitted.”

    The Last Theory is hosted by Mark Jeffery founder of Open Web Mind

    I release The Last Theory as a video too! Watch here.
    The full article is here.
    Kootenay Village Ventures Inc.
  • The Last Theory

    Stephen Wolfram's 10 ways to have big ideas

    28/05/2026 | 12 mins.
    Stephen Wolfram is an extraordinary thinker.
    He doesn’t seem to think like other scientists. He doesn’t seem to think like other technologists. And he certainly doesn’t think like an academic.
    So I asked him how he thinks. How does he have all the ideas I’ve been exploring at The Last Theory?
    Here are 10 ways to have big ideas, derived from Stephen’s answer:
    Drill down to the foundations
    Experiment with your ideas
    Try to understand your findings
    Have the humility to doubt your expectations
    Have the confidence to push ahead regardless
    Explain your ideas to others
    Discuss your ideas with others
    Get to know when an idea will take flight
    Don’t miss a step: imagine, experiment, explain
    Visualize your ideas

    Stephen Wolfram
    Stephen Wolfram
    The Wolfram Physics Project
    Wolfram Institute
    Wolfram Institute Community Discord
    Concept mentioned by Stephen
    Computational irreducibility

    The Last Theory is hosted by Mark Jeffery founder of Open Web Mind

    I release The Last Theory as a video too! Watch here.
    Kootenay Village Ventures Inc.
  • The Last Theory

    Why are we in the universe we're in?

    30/04/2026 | 17 mins.
    If physics is computational, then what gets computed when?
    This is a surprisingly deep question.
    The seemingly even computation of the universe gives us a clue, not just to the nature of time, but to the nature of the universe.
    And it leads us to a wider question:
    Why are we in the universe we’re in?
    Let me introduce you to three different answers to that question... sodifferent that they don’t even agree on whether one universe exists, or every possible universe exists.

    References
    Anthropic Principle
    Credits
    Image of Messier 101 galaxy by ESA/Hubble licensed under CC BY 4.0
    Image of galaxies by NASA, ESA, S. Beckwith (STScI) and the HUDF Team licensed under CC BY 4.0
    Retina image by د.مصطفى الجزار licensed under CC BY-SA 3.0

    The Last Theory is hosted by Mark Jeffery founder of Open Web Mind

    I release The Last Theory as a video too! Watch here.
    The full article is here.
    Kootenay Village Ventures Inc.
  • The Last Theory

    Wolfram on philosophy

    22/03/2026 | 7 mins.
    Stephen Wolfram has many philosophical ideas, but I’ve not heard him talk about pure philosophy.
    When I asked him about the relationship between physics and philosophy, I understood why.
    Stephen revealed that he’s much more at home in the concrete world of computer experiments than in the arguments of the philosophers.
    “When I look at the arguments,” he says, “I can’t tell if they make sense or not. There’s too much wiggling...”


    Stephen Wolfram
    Stephen Wolfram
    The Wolfram Physics Project
    Wolfram Institute
    Wolfram Institute Community Discord
    People and concepts mentioned by Stephen
    Immanuel Kant
    Kant’s antinomies
    Computational equivalence
    The Ruliad
    The Concept of the Ruliad

    The Last Theory is hosted by Mark Jeffery founder of Open Web Mind
    I release The Last Theory as a video too! Watch here.
    Kootenay Village Ventures Inc.
  • The Last Theory

    How different observers think differently with Stephen Wolfram

    05/03/2026 | 9 mins.
    Do different observers think differently? Or does the principle of computational equivalence mean that all observers think the same way?
    Stephen Wolfram takes this question and runs with it.
    If we had brains the size of planets, he suggests, the finite speed of light would force us to think of space and time differently, and abandon the fiction of an instantaneous state of space.
    If we had brains the size of molecules, he says, we’d no longer think of the motion of molecules as random, and we’d find the heat death of the universe a far more interesting prospect.
    And if we were able to hold multiple paths through the multiway graph in our minds at the same time, we’d have multiple threads of experience... and some complicated conversations!
    We think the way we think because we are the way we are... if we were much larger-scale, much smaller-scale or if we had multiway minds, then we’d think very differently.
    And this has some serious consequences, Stephen suggests, in fields as diverse as molecular biology and parallel computing.

    Stephen Wolfram
    Stephen Wolfram
    The Wolfram Physics Project
    Wolfram Institute
    Wolfram Institute Community Discord
    Credits
    Fullerene by YassineMrabet licensed under CC-BY-SA 3.0

    The Last Theory is hosted by Mark Jeffery founder of Open Web Mind

    I release The Last Theory as a video too! Watch here.
    Kootenay Village Ventures Inc.
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About The Last Theory
The Last Theory is an easy-to-follow exploration of what might be the last theory of physics. In 2020, Stephen Wolfram launched the Wolfram Physics Project to find the elusive fundamental theory that explains everything. On The Last Theory podcast, I investigate the implications of Wolfram's ideas and dig into the details of how his universe works. Join me for fresh insights into Wolfram Physics every other week.
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