From Dennis Overbye of the NY times:
There really isn't any such thing as a silly question in science, where the best people often are those who are free enough to think up a really outlandish question. Einstein said his success was due to the fact that he kept asking a child's questions when he was an adult. I am reminded of what Niels Bohr once said, "We are all agreed that your theory is crazy. The question which divides us is whether it is crazy enough to have a chance of being correct."