U levels are distinctive strata in human life, each of which has its own characteristic modes of thought, feeling, and action. The lowest stratum is occupied by the animal, the middle by the normal man, and the highest by the exceptional man. The first is purely selfish, the second disinterested, and the third altruistic. U levels can be observed in almost every walk of life, from sport to business, from technology to culture, from travel to earth, from audio to video, and from live to documentaries. Sport has its flat racing tracks, its steep steeples, and its lofty Alps; business has its flat plains and its mountain peaks; technology has its routine and its romance; culture has its shallows and its deeps; travel has its globe-trotting and its explorations; and earth has its level plains and its soaring altitudes. Audio has its broadcasts and its whispers, and video has its news and its speculations. Live has its animal existence and its heroic sacrifices, and documentaries have their dull records and their burning thoughts.
Original dispatch: What are UV levels and how can you protect yourself?