Bubbles are an instant smile generator for people of all ages, and something about them is rather intriguing. A close-up of this bubble in flight revealed a reflection of the surroundings on its surface, consisting of trees and a house. Even more interesting to me is the mirror image reversed on the bottom half of the bubble. This all has something to do with the reflective properties of light and curved surfaces, but I don't really understand it. I guess I don't really need to.