In my research on electromagnetism, I have understood that magnetism is forces created by moving charges and felt by moving charges. An electric current is a model of continuous flow of uncountable electrons moving in the same direction. This scheme seems benign but when I applied it to the Universe, I find in it a surprisingly judicious approach to solve the mystery of dark matter.
Please read the article at
Magnetism and dark matter http://pengkuanem.blogspot.com/2015/01/magnetism-and-dark-matter.html
or
https://www.academia.edu/10183169/Magnetism_and_dark_matter