Another possible theory surrounding dark matter is a modification of Newton’s law of gravity that shows there is no dark matter problem at all. Instead, MOND introduces a new constant of nature called \(a_o\). MOND says that instead of a gravitational relationship of \(1/r^2\), the relationship is actually only \(1/r\). This has tremendous implications. MOND is really good at modeling rotation curves and describes well formed systems. The problem is, MOND was invented to solve these problems, so it is not very shocking how good it models them. Some problems of MOND is that it cannot describe the early moments of the Universe and that instead of inertia being an inherent property, it is acquired from interactions throughout the Universe. But, if MOND is true, there is no problem with dark matter to be solved because it explains our observations very well and there is no lost mass. (7)