New research puts age of universe at 26.7 billion years, nearly twice as old as previously believed

Yes, this is a bit frustrating. Part of the scientific method is to propose new hypothesis, and that's what the original author did, so no issue with that. But then there is a chain of increasingly pop-sci media that hype some of these hypotheses as they were already confirmed and accepted by the mainstream scientific community, which is not the case. For example, the title of the article, "New research puts age of universe", that is pure clickbait, the correct tense is, being very generous, "could put".

And when this happens in a field like cosmology, it's relatively harmless. But the same happens in fields that have a more direct impact in the general public's life, like the usual "a couple of years ago they said eggs were unhealthy, and now they say we should eat 5 per day". And the effect is that people stop trusting the recommendations of the experts.

I mean, it's a bold idea, but I don't find it so shocking.

It's well possible that what we call a "fundamental" constant is a variable that depends on other deeper variables. For instance, an earth-bound observer might consider acceleration in freefall to be a constant, but knowledge of universal gravitation tells us it's a variable that depends on the masses of the objects involved and distance between them.

It makes sense that other ostensible "fundamental constants" are also dependent on the structure of the universe at any given point in space and time, but the limited window of our observations makes them appear as constants.

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and he can explain dark matter.

* dark energy. They are not the same.

He says he has a new way of describing light where it loses energy over time (something weird) and so it explains redshift.

From what I understand, the main idea behind tired light isn't particularly weird, it's just that scattering could potentially lead to a redshift as well. The issue is that if you assume enough scattering to explain cosmological redshift you would also get some other effects, which are however not observed. This basically ruled out the original tired light theory by Zwicky from the beginning. The author of this paper seems to try to get around that by combining a smaller amount of "tired light" with time-varying couplings. Unfortunately the paper is behind a paywall and I can't tell any more details.

He also says universal constants can change (something never observed before that would fundamentally change physics)

No, he says that coupling constants (not sure if that is what you mean by "universal constants" or not) can change, which is a generic consequence of the RG and has in fact been observed in nature (e.g. electron charge or strong coupling, to name just the most famous examples). From a QFT perspective, the cosmological constant is also a coupling, and several quantum gravity theories do in fact generically predict or suggest a time-varying cosmological constant. So this part by itself isn't really that out there, nor that original for that matter. However, since I can't access the paper I can't judge whether the author's way of varying Λ is reasonable or just a way to fit the data without any physical motivation, and I don't really know what the article means by "he proposes a constant that accounts for the evolution of the coupling constants".

and he can explain dark matter

That seems like a more grandiose claim to me, if accurate. Do you have a source for where the author claims that? Although he wouldn't be the first to do so.

I’m pretty sure this guy isn’t toppling physics today as the bar is set high for whatever evidence he is sharing.

I think this can be said for a lot of popular science article with topics like this. However, in many cases the blame can lie more with the pop-sci journalists who are looking for a cool story and might over-interpret the author's claims (I guess "physics toppled!!!11" sounds more interesting than "some guy suggests that some data might be fitted in a slightly different way"). Although in this case at least the age of the universe claim does seem to come from the author.

Edit: Judging by another article of the author someone else linked me to further down, it seems that while the author does speak of coupling constants, he really does refer to time-varying fundamental constants. So I must agree with the previous poster on this, it does seem quite a bit more out there than I had originally assumed.

Isn't dark matter just matter we can't percieve? Rogue asteriods and the like? I admit its been a minute since I studied this stuff, but dark matter isn't very special.

Hence the "unless there's something seriously wrong with the previous research" part. That is always a possibility, of course, but it's much less likely that is the case then that this single study is the thing that is wrong.

"Hubble constant" is a misnomer, and an old fashioned term. Cosmologist actually use the term "Hubble parameter" (which is in general time dependent except in very specific models which only contain dark energy), and denote its present value as H₀.

https://en.wikipedia.org/wiki/Hubble's_law#Time-dependence_of_Hubble_parameter

What you're talking about is the energy dependence of the coupling constants, which is a phenomenon that is very well understood theoretically, and also checked in experiments. The early universe was much hotter, and thus particles had much more kinetic energy and "felt" slightly different coupling constants. The neat thing is that, since this is a purely energy-dependent effect, we can recreate the conditions of the early universe: the collisions at LHC have an energy of the order of 1 TeV, which corresponds to a temperature of 10¹⁶K, the temperature 10^-12 s after the Big Bang. Anything after the first 10^-12 s we can directly recreate, and from 10^-12 s to about 10^-30 s-ish we can more or less reliably extrapolate. And of course this is all included in the standard Lambda-CMD cosmology.

Although the article is behind a paywall (which is somewhat strange in cosmology, but I digress), you can check other articles by the same author that also use the "varying constants" framework, for example https://arxiv.org/abs/2201.11667. His framework is that the speed of light c, the Planck constant h, the Boltzmann constant k and the Gravitational constant G depend directly on time, or to be more precise, on the expansion factor of the universe. There are two big differences with respect to what you were saying:

• c, h and k are not coupling constants, and therefore they don't receive any energy-dependent corrections. In fact, you could think of these constants as "conversion factors" between units: c converts space-time coordinates in seconds to space-time coordinates in meters, k converts kinetic energy in Joules (or electronvolts) to kinetic energy in Kelvin, and h converts angular momentum or action measured in quanta to angular momentum or action measured in J·s (or eV·s). Honestly it doesn't make much sense to me that these constants could change (what does it means, in physical terms), that they could change in a correlated way, or that they could change in a correlated way to one, and only one, coupling constant, G.
• Since this is a time-dependent change, there is no real way to significantly test the hypothesis (unlike the energy-dependent changes). We can not go back in time, or to wait to a different time when these constants would be different. He actually proposes to study how the experimental determinations of these constants in the last 10-20 years, which sounds very wild, as those tiny differences are very susceptible, by definition, to experimental uncertainties, and they are not very suitable for controlled tests.

It didn’t as time is relative just like space. There is no absolute standard of time to say “time moves faster”. Faster relative to what?

And yet, some of the greatest scientific discoveries of all time were made based on people’s feelings and intuition. Fucking shocker I know right. I’ll bet you’re fun at parties.

Okay, but the universe and our galaxy is really friggin' big. There very well could be other life out there, but is it intelligent enough to build spaceships? Perhaps. Has it figured out how to traverse the galaxy in a reasonable amount of time? I have doubts about that. Then what's the chance it would came across our own solar system? Pretty slim.

I like the hypothesis that any civilization that gets close to entering a space based civilization ultimately destroys itself like we are currently doing even though we basically have a solution in the form of humanistic philosophy and nuclear power for clean energy