In an old Star Trek episode, a 24th-century starship captain is weighed down by a knotty problem about how to deal with two of her enemies who are at war with each other. Unable to come up with a viable solution, she retreats to the holodeck, where virtual reality technology can create a convincingly real rendition of any desired scene. Where does she go for advice? She seeks out Leonardo da Vinci in his 16th-century studio. Once she has outlined her dilemma, Leonardo offers his counsel: "When one's imagination cannot provide an answer, one must turn to a greater imagination." This is my advice to you right now, Capricorn.