stagnation in science

Today's scientific discoveries take teams, and long times to come to fruition. And there seem to be fewer "aha" moments. Is it because we’ve found all the low-hanging fruit? Or were the words of Albert Michaelson, America's first Noble Prize winner in physics, correct? "The more important fundamental laws and facts of physical science,” he said, “have all been discovered." Or, even still, have we unintentionally distorted the marketplace of ideas?