Imagination is "the greatest creative force in the universe," claimed Albert Einstein. The keys at my fingertips, the computer transforming the clicks into hundreds of 0's and 1's, the copper lines and fibers of light delivering them to the device in front of you with its thousands of tiny light emitting diodes that project the letters you are reading, all started in the imagination. In fact, as you look around, you might be hard pressed to find anything within your reach that doesn't have its origins in the imaginings of creative people.