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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.

H.H.J. Luediger: "Even darker.... one can not easily downrate a racehorse to a donkey, but..." in Undecidability,...

Steve Agnew: "Well thank-you, you are very kind. I have come to appreciate the fact that..." in Quantum Dream Time

Samuel Parsons: "O also means a whole new universe in a box can be recreated a miniverse..." in Outside the Box

Samuel Parsons: "Is it 127? It's always comes back here. Just saying also I'm trying to..." in Outside the Box

Zeeya Merali: "INSPYRE, INternational School on modern PhYsics and REsearch, organized by..." in Welcome to INSPYRE 2020 -...

David Sloan: "Dear Alan, For any discussion regarding the essay contest, the contact..." in Undecidability,...

Jonathan Dickau: "Thank you Peter... For the kind words of explanation. It is looking like..." in From Cosmic Lighthouses...

Lawrence Crowell: "Tejinder, I was intrigued by your FQXi essay. Thanks for this reference to..." in Alternative Models of...

click titles to read articles

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.

Outside the Box
A proposed quantum set-up that could predict your game-playing strategy resurrects Newcomb’s classic quiz show paradox.

The Quantum Agent
Investigating how the quantum measurement process might be related to the emergence of intelligence, agency and free will.

First Things First: The Physics of Causality
Why do we remember the past and not the future? Untangling the connections between cause and effect, choice, and entropy.

May 28, 2020

Complete Podcast
The FQXi May 2, 2016 Podcast features:
  • Gravitational Waves & a MICROSCOPE on Galileo
  • Wrinkles in Spacetime
  • A Quantum Horror Story
INFO: MP3 file / 42 minutes / 41 MB
DOWNLOAD (right-click Windows, control-click Mac)
DISCUSS in the FQXi Community Forum
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Featured video in this podcast:
Individual Stories
Gravitational Waves & a MICROSCOPE on Galileo
In the news: the MICROSCOPE experiment launches to test the equivalence principle, as Zeeya and Brendan discuss. And a special report on how the detection of gravitational waves will enable physicists to probe quantum gravity and neutron stars. LIGO physicist Alessandra Buonanno and quantum gravity expert Ted Jacobson talk to Brendan Foster.
INFO: MP3 file / 17 minutes / 16 MB
DOWNLOAD (right-click Windows, control-click Mac)
Wrinkles in Spacetime
Physicist Sabine Hossenfelder describes her search for defects in spacetime, which could help home in on a theory of quantum gravity, to reporter Colin Stuart.
INFO: MP3 file / 8 minutes / 8 MB
DOWNLOAD (right-click Windows, control-click Mac)
A Quantum Horror Story
Are you scared of the monster under the bed? Author Liam Hogan reads his spooky award-winning short story, Ana, and chats about his background in physics and his writing to Zeeya Merali.
INFO: MP3 file / 17 minutes / 17 MB
DOWNLOAD (right-click Windows, control-click Mac)
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Recent Comments

End of Spacetime, End of Einstein

Nobel Laureate David Gross observed, "Everyone in string theory is convinced...that spacetime is doomed. But we don't know what it's replaced by."

Nima Arkani-Hamed (06:09): "Almost all of us believe that space-time doesn't really exist, space-time is doomed and has to be replaced by some more primitive building blocks."

What scientific idea is ready for retirement? Steve Giddings: "Spacetime. Physics has always been regarded as playing...

Clifford Will: "I must say that when they found the waves, proving Einstein right, I thought it came from an unexpected source (the black holes). I thought it would be neutron stars."

Faking black hole gravitational waves is safe (nobody can expose the fraud) but faking neutron star gravitational waves is dangerous:

"Models predict that the merging of two stellar-mass black holes would not produce light at any wavelength, but if one or two neutron stars were involved in the...

About this dark matter ,there is an interesting road of anayse if we consider the zero absolute.If we take for example our milky way and andromeda the nearest galaxy.We have a sphere of dark matter for both of these galaxies different due to their correlated BH.This mater not baryonic is a reality and if we consider the cold and the spherical volumes, it becomes relevant when we consider stars and this central BH.If the main gravitational informations are from the central cosm sphere,th biggest...

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