Based on Einstein’s general relativity theory, increase in mass causes time dilation. In this paper we introduce 2 identical closed systems A&B. Each system contains masses M&m where .Each system can be in one of 2 stable steady states modes, mode 1 in which m is far from M held in its position by a slider (Fig. 1) and mode 2 in which m has travelled towards M because of its gravitational pull, until they both collided and became a unified mass (fig. 3). At mode 1 the system is potential energy dominated and in mode 2 the system has transferred its potential energy first to kinetic energy and finally after the collision to heat (radiation) energy which was radiated immediately out of the system until reaching a stable steady state mode. Switching between the 2 modes is possible through the slider (Fig. 3) which by sliding aside enables mass m to be pulled by gravity towards mass M. A seconds. In system B the sequence is: mode 1 for seconds and mode 2 for seconds. Where , , .Although in both systems the total energy ,the total time and the surrounding conditions are the same at the end point after time T (Fig. 3) the entropy in system B is lower than the entropy in system A and we will name this “The entropy paradox”.