The current theoretical model for the composition of the universe is that it's made of normal matter, dark energy and dark matter. A new University of Ottawa study challenges this.
It’s not that dark matter was the only theory, there are also different theories based on modified newtonian dynamics (MOND), these aren’t any better than dark matter though, maybe even worse theories.
It’s not that dark matter was the only theory, there are also different theories based on modified newtonian dynamics (MOND), these aren’t any better than dark matter though, maybe even worse theories.