If someone tells you they solved the mystery of Amelia Earhart's fate, you might be skeptical at first, but if they have a well documented, thoroughly pondered explanation, you would probably hear them out and who knows, you might even be convinced. But what if, in the next breath, they tell you that they actually have a second explanation as well. You listen patiently and discover and are surprised to find the alternate explanation to be as well documented and thought through as the first. And after finishing the second explanation you are presented with a third, a fourth, and even a fifth explanation--each one different from the others and yet equally convincing. No doubt, by the end of the experience you would feel no closer to Amelia Earhart's true fate than you did at the outset. In the arena of fundamental explanations, more is definitely less.

--Brian Greene, The Elegant Universe