@PdotdQ and @dga471 please help me understand this. Thanks.
https://www.aanda.org/articles/aa/abs/2018/12/aa32898-18/aa32898-18.html
These types of speculative theories purporting that they can solve dark matter/dark energy appear many times per year. I usually don’t really pay attention to them until they are more mature.
For this one, the dark matter/energy is replaced by a fluid with expulsive gravity permeating the universe. While the particulars of this fluid might be new, note that there were many previous speculative theories where dark matter/energy is assumed to be a fluid (or even a quantum fluid).
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Here’s the paper, it is getting a lot of press.
The headline makes it sound like 95% of the cosmos is missing. 