Recently, I watched a YouTube video about those expensive glasses that allow a color blind person to perceive color. Then I watched a documentary about how the world looks through the multi-faceted eye of a bumble bee, and finally I watched a video about the different spectra of light and how the human eye only perceives a limited number. I came away from all these experiences wondering what an alien visitor to the earth might "see" as he/she/it stepped out of it's spaceship. Our version of reality is so, so limited.