Were you ever scared of the dark? It's not surprising if you were, or if you still are today, because humans are creatures of the light, deeply programmed through millions of years of history to avoid the dark dangers of the night. Light is vitally important to us, but we don't always take the trouble to understand it. Why does it make some things appear to be different colors from others? Does it travel as particles or as waves? Why does it move so quickly? Let's take a closer look at some of these questions—let's shed some light on light!