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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.

John Merryman: "The problem is that we do experience reality as those discrete flashes of..." in The Quantum...

Thomas Ray: "(reposted in correct thread) Lorraine, Nah. That's nothing like my view...." in 2015 in Review: New...

Lorraine Ford: "Clearly “law-of-nature” relationships and associated numbers represent..." in Physics of the Observer -...

Lee Bloomquist: "Information Channel. An example from Jon Barwise. At the workshop..." in Physics of the Observer -...

Lee Bloomquist: "Please clarify. I just tried to put a simple model of an observer in the..." in Alternative Models of...

Lee Bloomquist: "Footnote...for the above post, the one with the equation existence =..." in Alternative Models of...

Thomas Ray: "In fact, symmetry is the most pervasive physical principle that exists. ..." in “Spookiness”...

Thomas Ray: "It's easy to get wound around the axle with black hole thermodynamics,..." in “Spookiness”...

click titles to read articles

Why Time Might Not Be an Illusion
Einstein’s relativity pushes physicists towards a picture of the universe as a block, in which the past, present, and future all exist on the same footing; but maybe that shift in thinking has gone too far.

The Complexity Conundrum
Resolving the black hole firewall paradox—by calculating what a real astronaut would compute at the black hole's edge.

Quantum Dream Time
Defining a ‘quantum clock’ and a 'quantum ruler' could help those attempting to unify physics—and solve the mystery of vanishing time.

Our Place in the Multiverse
Calculating the odds that intelligent observers arise in parallel universes—and working out what they might see.

Sounding the Drums to Listen for Gravity’s Effect on Quantum Phenomena
A bench-top experiment could test the notion that gravity breaks delicate quantum superpositions.

March 17, 2018

Complete Podcast
The FQXi November 9, 2015 Podcast features:
  • FQXi Grant & Neutrino Prizes
  • A Cosmic Test for Time
  • Existential Risk
  • Thunderbirds Meets Quantum Physics
INFO: MP3 file / 41 minutes / 40 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
FQXi Grant & Neutrino Prizes
In this week's news round-up, Zeeya & Brendan discuss the launch of FQXi's $2million grant round, Physics of the Observer, & the Nobel and Breakthrough Prizes in Physics for the discovery of neutrino oscillations--with help from astrophysicist Katie Mack.
INFO: MP3 file / 10 minutes / 10 MB
DOWNLOAD (right-click Windows, control-click Mac)
A Cosmic Test for Time
A solar-system-sized experiment to test the nature of time: is time malleable, as general relativity suggests, or uncertain, as quantum mechanics asserts? SETI scientist Laurance Doyle describes his plans to bounce radar from the moons of Jupiter to reporter John Farrell.
INFO: MP3 file / 11 minutes / 11 MB
DOWNLOAD (right-click Windows, control-click Mac)
Existential Risk
Nick Bostrom of the Future of Humanity Institute assesses the risks of a global catastrophe that could wipe out life, either from natural or human-induced environmental disasters or machine intelligence, synthetic biology, or nanotechnology that has got out of hand. With reporter Carinne Piekema.
INFO: MP3 file / 14 minutes / 14 MB
DOWNLOAD (right-click Windows, control-click Mac)
Thunderbirds Meets Quantum Physics
Particle physicist Ben Still chats about his beginner's guide to understanding the subatomic world -- as told by Brains, of the 1960s science fiction series Thunderbirds -- with reporter Sophie Hebden.
INFO: MP3 file / 5 minutes / 5 MB
DOWNLOAD (right-click Windows, control-click Mac)
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Recent Comments

Yes : ), I have never tried the computer screen thing but I will take your word for it.

Steve and Georgina,

Colors, like "red", cannot be measured at all; they are purely subjective responses to the objective properties of light. The best that we can do is measure properties like amplitudes and frequencies, and then deduce, rather than measure, that a normal human visual system, will produce the perception of the color, in response to those objective properties.

The difference is important. When you see the color yellow, on your computer screen, you are not "seeing"...


RE: "The Pound-Rebka experiment is compatible with Newton's emission theory of light", and "in general relativity, the speed of light falling towards the source of gravity idiotically DECREASES (in the gravitational field of the Earth the acceleration of falling photons is NEGATIVE, -2g)"

Have you actually read the paper? If you have not go to the second to the last paragraph and study the Plus and Minus signage before talking of compatibility or not with...

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