The skill of communication can be challenging. For the inhabitants of Venus, to communicate means the using a bewildering array of colour. Yes communication on Venus is involved. A layer of sulphuric acid surrounding the planet has caused the planets surface to turn a white.
As the inhabitants of Venus love colour they use the chalk like surface of their world to paint transient images. Over millennia, all life on this world developed photographic memories, as the planets turbulent atmosphere means that these images are regularly blown away. That was, until earths interplanetary traders started delivering acrylic resin fixatives.