The problem with the article is that CMB is only one of the ways to verify the existance of Dark Matter.
The reason why Dark Matter was proposed was because of the rotational velocity of stars in galaxies. Stars orbit galaxies at the wrong speed given the matter we see. Dark Matter "Halos" are used to explain why the speeds don't add up.
CMB only indirectly is used to prove the existance of Dark Matter. The measurements only really measure how "clumpy" the universe was right after the Big Bang.
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The problem with the article is that CMB is only one of the ways to verify the existance of Dark Matter. The reason why Dark Matter was proposed was because of the rotational velocity of stars in galaxies. Stars orbit galaxies at the wrong speed given the matter we see. Dark Matter "Halos" are used to explain why the speeds don't add up. CMB only indirectly is used to prove the existance of Dark Matter. The measurements only really measure how "clumpy" the universe was right after the Big Bang.