Superfluid Dark Matter Passes Another Check

Superfluid Dark Matter Passes Another Check
N.R.Fuller/National Science Foundation via AP

Physicists still haven't figured out what dark matter is made of, if anything. The idea that it's made of particles that interact so weakly we haven't yet measured them works well to explain some of the observational evidence. Notably the motions of galaxies bound to clusters and the features of the cosmic microwave background fit with theories of particle dark matter straight-forwardly. The galaxies themselves, not so much.

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