Humans have a need to understand where they fit in the cosmos. Driven by the unlimited possibilities of human imagination the night sky has been and is one of the most powerful stimulators of curiosity. In pre-modern times, farmers, pastoralists, travelers, even city dwellers unhampered by light pollution, had many opportunities to observe and wonder on the mysteries of the starry night. In this, the International Year of Astronomy marking the 400th anniversary of Galileo's telescopic observations (that is also the 200th anniversary of the birth of Charles Darwin) there are many explorations using the advanced and expensive instruments that society provides for satisfying the public curiosity and, of course, that of the astronomers trained to ask and answer the questions. However, it is a truism that scientific answers always raise new questions that could not have been asked raised prior to the preceding answers. The more we know the more we know about what we do not know; the task of scientific inquiry, or, for that matter, inquiry in general, is endless.