Dark matter was invented to explain the motions of galaxies, which are more simply explained by observation of an electrically active universe.
"Astrophysicist Hannes Alfvén elucidated his “electric galaxies” theory in 1981. Alfvén (a Nobel laureate) noticed that galaxies and their motions resemble a homopolar motor. A homopolar motor operates because electric currents create magnetic fields, causing a metal disc to spin at a rate directly proportional to the supplied current." -thunderbolts.info