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Dark Matter Could Map the Universe's Early Magnetic Fields
Even though we still don't know what dark matter is, astronomers can use it as a natural telescope lens with gravitational lensing. A new theoretical paper suggests that mini-halos of dark matter in the early Universe could be used as a probe to map out primordial magnetic fields. These magnetic fields are everywhere in the cosmos today, but were they produced in the early stages of the Universe? It depends on the influence of magnetic fields on dark matter.
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