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Nicholas Hernandez: on 12/5/18 at 15:15pm UTC, wrote It is really good experiment. I hope everything will be revealed rooftop...

Dona Gilbert: on 5/14/18 at 5:36am UTC, wrote Is this a solar panel? I liked the design of the panel very much and would...

Priya Rani: on 5/1/18 at 8:57am UTC, wrote I like your all post. You have done really good work. ...

Joe Fisher: on 3/28/18 at 20:35pm UTC, wrote These astute Australian astronomers claim to know that although the stars...

Joe Fisher: on 3/28/18 at 15:29pm UTC, wrote These astute Australian astronomers claim to know that although the stars...

Joe Fisher: on 3/27/18 at 15:31pm UTC, wrote I am ever so glad that the alert astronomers have actually detected...

Steve Agnew: on 3/27/18 at 4:12am UTC, wrote This is a great experiment and result and so hopefully will spur on further...

Steve Dufourny: on 3/22/18 at 21:28pm UTC, wrote Hi Zeeya, I say me if they exist these multiverses with different laws...


Robert McEachern: ""all experiments have pointed towards this and there is no way to avoid..." in Review of "Foundations of...

Joe Fisher: "Dear Steve Agnew, Naturally provided VISIBLE realty am not a silly humanly..." in Can Time Be Saved From...

James Putnam: "Light bends because it is accelerating. It accelerates toward an object..." in Black Hole Photographed...

Steve Agnew: "Stringy and loop quantum are the two big contenders, but neither has a..." in Can Time Be Saved From...

Robert McEachern: "Lorenzo, The nature of "information" is well understood outside of..." in Review of "Foundations of...

Georgina Woodward: "Steve, Lorraine is writing about a simpler "knowing " rather than the..." in The Nature of Time

Steve Agnew: "Knowing information necessarily means neural action potentials. Atom and..." in The Nature of Time

click titles to read articles

Can Time Be Saved From Physics?
Philosophers, physicists and neuroscientists discuss how our sense of time’s flow might arise through our interactions with external stimuli—despite suggestions from Einstein's relativity that our perception of the passage of time is an illusion.

A devilish new framework of thermodynamics that focuses on how we observe information could help illuminate our understanding of probability and rewrite quantum theory.

Gravity's Residue
An unusual approach to unifying the laws of physics could solve Hawking's black-hole information paradox—and its predicted gravitational "memory effect" could be picked up by LIGO.

Could Mind Forge the Universe?
Objective reality, and the laws of physics themselves, emerge from our observations, according to a new framework that turns what we think of as fundamental on its head.

Dissolving Quantum Paradoxes
The impossibility of building a perfect clock could help explain away microscale weirdness.

May 20, 2019

CATEGORY: Blog [back]
TOPIC: Cosmic Dawn, Parallel Observers, and a Science Hostel in Maui: New Podcast [refresh]
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FQXi Administrator Zeeya Merali wrote on Mar. 21, 2018 @ 20:04 GMT
EDGES antenna, by Suzyj, Wikicommons
This month’s podcast features the exciting discovery of signs of the first stars made by astronomers using the EDGES experiment, in Western Australia (right), published in Nature, in February. It’s long been predicted that they should see such an indirect signal, which they picked up as a dip in the intensity of radiation in the cosmic microwave background (the afterglow of the big bang). But while this signal was where they thought it would be, and confirmed when they thought the first stars appeared — some 180 million years after the big bang — the detection raised new puzzles. The signal was far stronger than had been predicted. So, I spoke with cosmologist Rennan Barkana, of Tel Aviv University in Israel, who published a companion paper in the same edition of Nature, offering a possible solution: the boosted signal could be caused by an unexpected interaction with dark matter, in the early universe.

Free Podcast

Remembering Stephen Hawking; light from the first stars in the universe, with Rennan Barkana; our place in the multiverse, with Eugene Lim; & setting up a science hostel in Maui, with Garrett Lisi.


Go to full podcast

Next, reporter Sophie Hebden chatted to cosmologist Eugene Lim, of King’s College London, about what we may be able to infer about observers in parallel universes. Lim, and his colleague Richard Easther, at the University of Auckland, are examining the possibility that we live in a multiverse of neighbouring cosmoses that each have different physical laws. But how likely is it that sentient observers will arise in those regions? What are the minimal set of physical properties needed for such observers to evolve? And what might our multiversal neighbours be able to measure? Answering such questions might help explain why our universe has the peculiar rules that it does. (You can read more about Lim and Easther’s work in Sophie's article, "Our Place in the Multiverse.")

And, if you're wondering what we do when we're not podcasting, the answer, for Brendan Foster at least, is he enjoys relaxing in Maui. But on this holiday, he took some time to meet with theoretical physicist Garrett Lisi, who has opened a hostel for scientists to visit and spend time working. Listen now to hear Brendan’s verdict on whether staying in such an idyllic location can be productive for research.

Finally, we've been away for a while. In the meantime, we saw the sad passing of two giants of theoretical physics, Joe Polchinski and Stephen Hawking. The latter died after we recorded the main edition, but we've added a few words to commemorate these huge losses. Both shall be missed.

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Steve Dufourny wrote on Mar. 22, 2018 @ 21:28 GMT
Hi Zeeya,

I say me if they exist these multiverses with different laws that after all we return still at this uniquness and an universal main sphere and Inside we have all these universe, sphères with their cosmological and quantum sphères but with different laws, it becomes intriguing all this ...

Best Regards

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Steve Agnew wrote on Mar. 27, 2018 @ 04:12 GMT
This is a great experiment and result and so hopefully will spur on further investigations on the spectra of the early universe. The new Webb telescope will of course greatly contribute greatly to our knowledge of the young universe in a much more significant way.

Eventually, the gravity wave sensors of future missions will ultimately reveal the true nature of the early universe and allow us to finally know what has so far been hidden from science.

This measurement of when stars first appear is really important for creation. Without creation, nothing would exist and so the cmb creation is from where we all come. Getting the first stars right will help with the details but the cmb creation is still the bee's knees...

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Joe Fisher wrote on Mar. 27, 2018 @ 15:31 GMT
I am ever so glad that the alert astronomers have actually detected (finite) signs of light from the first stars in the universe. Of course, it would have been better had they spotted actual light from the first stars, but the fact that they were able to isolate the first (finite) stars (without confusing them with the second set of (finite) stars) is yet another sparkling example of scientific capability at its most profound.

Joe Fisher

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Joe Fisher wrote on Mar. 28, 2018 @ 20:35 GMT
These astute Australian astronomers claim to know that although the stars we see with our naked eyes emit light and radio waves, their radio telescope has detected a different kind of radio wave emanating from some sort of very cold gas which existed before it started forming into the first finite stars. But if the extremely cold gas formed the finite first stars, how on earth is it still emitting the special radio wave solely to the Australian radio telescope? Why could not the ultra freezing area be about to form into a spanking brand new set of stars?

Joe Fisher, Realist

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