The wrinkles left over from the Big Bang may have magnetized the universe

A new study suggests that cosmic strings – the strange creases in space-time left over from the first moments of the Big Bang – may create magnetic fields in their wake. Scientists propose in a new paper that these magnetic fields will absorb the universe, explaining the magnetization of galaxies and clusters.

Almost every intrinsic body in the universe hosts a magnetic field. Smaller objects, such as planets and stars, generate their magnetic fields from the actions of the dynamo within them, as vortex flows of electrically charged plasma force the weak magnetic fields to fold in on themselves.

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