The paper: https://arxiv.org/abs/2401.12286
> Dark matter is the mysterious, unknown substance that seems to make up the bulk of all the mass in the universe; for every 2 pounds (1 kilogram) of regular matter, there's roughly 10 pounds (5 kg) of dark matter.
The units here are pretty silly. They are only talking about proportions, so they could have gone with banana-equivalents, and it would still have worked.
My favorite works to date regarding a mirror universe answering cosmology open questions is the stuff Neil Turok's been spitting out over the last decade:
https://insidetheperimeter.ca/a-mirror-universe-might-tell-a...
Highly recommend for anyone into this topic.
Curious about conservation of charge - if all dark protons were to decay then there must be also an abundance of dark positrons?
This is the same website that publishes stories with ignorant, idiotic headlines like "There's an asteroid out there worth $100,000 quadrillion. Why haven't we mined it?". Um, don't write about economics if you don't understand it.
Doesn't HN have a policy mandating original sources?
Tangential - what is the a good book to catchup on the latest state of cosmological research?
There are non-mainstream explanations for how what keeps the universe going that have a much simpler model and a much better track record on predictability. There are six prevailing different incompatible theories for black holes and if you ask someone which of the six theories they are talking about when they insist that black holes do exist it's very rare that they will be able to tell you which.
"The invisible substance called dark matter remains one of the biggest mysteries in cosmology."
Gee I wonder why. Maybe it's because your goofy dark matter model is so broken you're borderline just making s** up.
"Dark matter is the mysterious, unknown substance that seems to make up the bulk of all the mass in the universe; for every 2 pounds (1 kilogram) of regular matter, there's roughly 10 pounds (5 kg) of dark matter."
...
"This symmetry would help explain why dark matter and regular matter have roughly the same abundances."
So 1 is "roughly the same" as 5, or is this an orders-of-magnitude comparison?
They could call it "the upside down".
>one of the biggest mysteries in cosmology.
Of course it could be that cosmology is wrong.
There was a time (until 99 years ago) that the Milky Way was the universe.
Waiting for the sci fi movie
Url changed from https://futurism.com/the-byte/dark-matter-mirror-universe, which points to this.
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Man this abstraction sounds like another abstraction that sounds cool wows!
So that's where we go when we die?
Unrelated, but somewhat interesting in Hindu cosmology and ancient scriptures the edges of the bubble of the universe store everything happening, that has happened and is to happen.
The idea of metaphysics isn't foreign to science, as I see. Once the science acknowledges that 90% of our universe is invisible something, and that something has a structure, it's one step from the hypothesis that there are lifeforms in that "dark mirror" universe.
I have joked before about the apparent lack of life in the universe, that we are just living in unencrypted 'plain text' mode. But all the developed aliens have moved to encrypted space. ;)