All over the Earth, just a few miles below our feet, the powerful tectonic forces that create and destroy the Earth's crust are at work 24 hours a day. We're usually unaware of them until a violent earthquake, volcanic eruption, or tsunami threatens lives and property, but this cycle is essential to all life.
The Real World (1992 â now) is the longest running reality show, and it is also the longest running show on MTV. Many people credit or blame it for the modern reality show. Murder, She Wrote (1984 â 1996) is the longest-lived mystery program.
On Wednesday night, David Letterman â the longest-reigning late-night host in television history â officially ended his run on âThe Late Showâ with a historic final episode. The 80-minute episode was packed with celebrity guests, video montages, flashbacks of famous sketches and much gratitude from the host, who thanked a long list of people who helped build his historic career.