If one makes a graph of the average distance between galaxies over time the line must be rising since the beginning. This is the expanding phase. Later, if the universe does not have sufficient expanding velocity for its density and gravity, the line must reach a maximum and then descend. The graph of such a universe will look like the trajectory of a ball after its first bounce and before its second bounce. But a ball can make a number of bounces. This gets many cosmologists thinking about what we may call the “bouncing universe.” The idea has a connection with the Hindu idea of universal cycles.