The math just doesn't make an impact on a lot of people.<br><br>I once had a woman tell me that she took photos of the moon one night, and didn't understand why they didn't come out- she had used a flash, after all...<br><br>Similarly, at a party once a man told me that during the '50s we had set off nuclear explosions in the Van Allen belt to see what it would do. Now, I can think of any number of reasons why this might be stupid idea, but his didn't occur to me.. he felt that other civilizations "out there" would take this as aggression on our part. I tried to explain the scale involved, but again....<br>