That was an interesting video from Sabina Hossenfelder today, in which she notes that a new calculation of how much "normal" matter is in certain galaxy clusters indicates that MOND (the explanation for how gravity works without the need for the dark matter no one can directly detect) works OK for clusters as well as for individual galaxies.
Yet, she still gives the paper a 7/10 on her "bullshit meter" - which seems a tad tough. I thought she was more sympathetic to MOND than to say that.
I notice that some people in comments also dismiss MOND because it doesn't work with General Relativity - which does seem a good point, but I don't know what MOND theorists say about that.
Anyway, the video is one of her more easily understood ones, so I like it.
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