Did you know that there's an arrow hidden in FedEx logo? You have probably missed that tiny detail when you saw the logo for the first time, but once you know where to look, you cannot un-see it. FedEx's logo is just one example of brilliant logo designs that hold secret messages. They were created using clever visual tricks that are not obvious from the beginning, but when you figure them out, they add a lot of the depth to brand's image. Moreover, some logos tell very interesting...