Psychologists have spent decades studying marital satisfaction. One of the more interesting and robust findings in Western societies is that satisfaction decreases during the first years of marriage. [1] [2] [3] [4] [5] [6] A few couples escape this trend, but the large majority of married couples see their satisfaction decline over time. Psychologists have offered three types of explanations for these declines: normal rebound, emotional erosion, and motivational erosion. These are not mutually exclusive explanations. Combinations of all three factors could contribute to declines in marital satisfaction.Fusion is the energy source of the sun and the stars. On earth, fusion research is aimed at demonstrating that this energy source can be used to produce electricity in a safe and environmentally benign way, with abundant fuel resources, to meet the needs