As an attempt to explain the anomalous constant velocity of the stars at the out-skirts of galaxies, known as ‘flattening of galaxies rotation-curves’, Milgrom M. has proposed a modification to Newtonian Dynamics; that at very low gravitational accelerations, of the order of 10-10 meter/second2, and below, the gravitational acceleration experienced by the stars at the out-skirts of spiral galaxies may be: [(G M / R^2) ( a0 )]^1/2, instead of Newtonian expression: [ G M / R^2] . It has been found by this author, as well as by others, that a0 is close to H0 c (where H0 is Hubble’s constant, and c the speed of light). Also, a0 is close to G M0 / R0^2 (where M0 is total mass of the universe required for closer of the universe, and R0 is radius of the universe, R0= c/ H0). Based on these findings, it is indicated here that the strength of gravity beyond the boundary of spiral galaxies may be much higher, than expected from Newtonian gravity. Therefore, the actual attractive force between the galaxies can be much higher than that due to Newtonian Dynamics; and the total mass of the universe required for closer of the universe, may be as less as it is already observed. Thus, if MOND is correct, then even ‘dark-energy’ may not be required.