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Looking for a different sort of dark matter with GPS satellites

We still don’t know what dark matter is. The most widely accepted possibility is Weakly Interacting Massive Particles, or WIMPs, and most dark matter searches are looking for those. But other possibilities remain, and these alternatives to WIMPs, the "monstrous creatures at the edges of the dark matter map," are still generally particles, theoretical, exotic, or otherwise. These particles could comprise the mysterious matter that holds the galaxies together and makes up 26.8 percent of the mass-energy of the Universe.

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arstechnica.com
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