If you can resist the allure of this museum, I'd wager you've spent the last 70 years in a bubble. You can watch and hear all the great personalities of TV and radio -- from Uncle Miltie to Johnny Carson to Jerry Seinfeld -- at a private console (available for 2 hr.). And you can also conduct computer searches to pick out the great moments of history, viewing almost anything that made its way onto the airwaves, from the Beatles' first appearance on The Ed Sullivan Show to the crumbling of the Berlin Wall (the collection consists of 75,000 programs and commercials). Selected programs are also presented in two theaters and two screening rooms, which can range from "Barbra Streisand: The Television Performances" to little-seen Monty Python episodes.