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The FQXi podcast brings you the latest ideas in foundational physics and cosmology—and includes interviews with our members and other leading scientists. It's hosted by Zeeya Merali and Brendan Foster. You can contact us at, and follow us on twitter: @FQXi. The podcast is produced by Zeeya, and music is provided by Baltimore-based Diefenbaker.

Joe Fisher: "All visible humanly contrived information contains supposedly finite..." in Time to Think

Noah Isabella: "You can either choose both Box A and B, or just Box B. But here's the..." in Outside the Box

Steve Dufourny: "Here is my equation improved hypothetical considering the 3 main spacetimes..." in The Noise of Gravitons

Steve Dufourny: "John, Steve, Like I am not only focused on my own works, I discussed on..." in The Noise of Gravitons

PRASAD DIVATE: "Hi all, I just read that there are 64 dimensions in the universe and God..." in AI, Consciousness,...

Steve Dufourny: "sure, without doubting ,we must doubt :) I make the same for all my model..." in AI, Consciousness,...

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Time to Think
Philosopher Jenann Ismael invokes the thermodynamic arrow of time to explain how human intelligence emerged through culture.

Lockdown Lab Life
Grounded physicists are exploring the use of online and virtual-reality conferencing, and AI-controlled experiments, to maintain social distancing. Post-pandemic, these positive innovations could make science more accessible and environmentally-friendly.

Is Causality Fundamental?
Untangling how the human perception of cause-and-effect might arise from quantum physics, may help us understand the limits and the potential of AI.

Building Agency in the Biology Lab
Physicists are using optogenetics techniques to make a rudimentary agent, from cellular components, which can convert measurements into actions using light.

Think Quantum to Build Better AI
Investigating how quantum memory storage could aid machine learning and how quantum interactions with the environment may have played a role in evolution.

September 23, 2020

Complete Podcast
The FQXi July 30, 2019 Podcast features:
  • Memory, Causality and Cats -- Sean Carroll
INFO: MP3 file / 24 minutes / 58 MB
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Individual Stories
Memory, Causality and Cats -- Sean Carroll
Cosmologist Sean Carroll is searching for a mathematical description of why causes precede effects and asking what makes our memories of the past special and different from calculations of what went before. Audio of a talk from the FQXi meeting in Tuscany.
INFO: MP3 file / 24 minutes / 58 MB
DOWNLOAD (right-click Windows, control-click Mac)
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Recent Comments

When you look at the world as a system, it is obvious that there is only one natural time-direction ratchet in the system, and that is quantum events.

When you look at the world as a system, it is obvious that the algorithmic cause of number change in quantum events is the driver of all other number change in the system via law of nature relationships.

But physics makes the mistake of thinking that a set of equations and numbers, without algorithmic drivers, constitutes a...

Here is a nice slide from Gu's talk that shows the superposition of precursors and outcomes. Note that time emerges from precursors and outcomes and so the past, present, and future all emerges from things that happen.

Things do not happen in a mostly empty space and time, but rather the notions of space and time emerge from things that happen...

You may not believe that precursors and their outcomes exist in quantum superpositions, but that is exactly what quantum reality means. Usually these superpositions are dephased rather quickly into a seeming determinate reality, but really there are unknowable quantum precursors...

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