If you replace cosmology with cosmetology that paragraph is more entertaining.Short version as I understand it (and help me physics majors) --
Time can flow at different speeds in different parts of the universe at high speeds or under intense gravitation forces. Speeds and forces that can be imagined by physicists in equations and observed in the cosmology of the universe, but not speeds and forces that ordinary humans on Earth ever experience.
Why would time flow at different speeds under different circumstances? That's beyond me.
Also, thanks for the explanation.