The document discusses the history of anime, beginning with Astro Boy which was one of the first to become popular in the US in the 1960s. Anime grew in popularity in the US during the 1970s with shows like Speed Racer and Inspector Zenigata. In the 1980s, anime for mature audiences emerged alongside more conventional shows. Massively popular shows of the 1990s like Dragon Ball Z, Pokémon, and Sailor Moon focused on younger audiences. Modern popular anime spans genres and includes titles like Naruto, Shugo Chara, and Full Metal Alchemist that are age-appropriate.