Neutrinos are not the dark matter that we know about in cosmology, at least we don't think that they are because they move too fast. They're too low mass and high velocity to fit the detailed properties of dark matter. We've talked about that on the podcast with people like Lina Naseeb, if you want to go back in the archives but we haven't spotted them yet. If we find it, I don't know, you'll know.

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