What is vision? How does the eye preprocess data? What happens with the data in the brain? How do earthlings create a model of the world in their head? How do earthlings recognize shapes? Do earthlings have a brain cell for Halle Berry? Why is color a matter of biology, and not of physics? What is color anyway? What's so special about the vision of the mantis shrimp? What is a levy drone? And what has color to do with the worst brass bands in the Galaxy?