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Summary by a commenter in the link: Radio astronomy observations of Pulsars indicate that the Hubble Red Shift is caused by “Tired Light” rather than the expansion of the universe.
When Hubble published his observations of red shifted light from distant objects there were two possible explanations that came to the fore. One, originated by Georges Lemaitre, was that the Universe was expanding. The other, from Fritz Zwicky, was that light lost energy as it traveled, termed "tired light". At that time, ca. 1930, interstellar and intergalactic space were assumed to be perfect vacuums and thus there was no mechanism to redden the light. Now, 90 years later, we have actual observational evidence that Zwicky was right.
In the radio astronomy of Pulsars we find that the shorter wavelengths of the leading edge of the pulse arrive before longer wavelengths. The velocity of light, c, is NOT constant but varies by wavelength. This time dispersion is proportional to the distance from us of the pulsar, indicating that the reduction in velocity is cumulative. The observed effect is isotropic. The interstellar medium is not a vacuum but rather affects light waves in a way best described as having an Index of Refraction greater than 1, unity. We find the same phenomenon in the observation of Fast Radio Bursts from other galaxies, thus indicating that the intergalactic media is not an electromagnetic vacuum.


https://iai.tv/articles/the-big-bang-didnt-happen-auid-2215
https://devblogs.microsoft.com/oldnewthing/20220816-00/?p=106994

Very interesting story:

A colleague of mine shared a story from Windows XP product support. A major computer manufacturer discovered that playing the music video for Janet Jackson’s “Rhythm Nation” would crash certain models of laptops. I would not have wanted to be in the laboratory that they must have set up to investigate this problem. Not an artistic judgement.

One discovery during the investigation is that playing the music video also crashed some of their competitors’ laptops.

And then they discovered something extremely weird: Playing the music video on one laptop caused a laptop sitting nearby to crash, even though that other laptop wasn’t playing the video!

What’s going on?