"Fear of a Blank Planet" is a Porcupine Tree song. It appears as the first track on the album of the same name. A promo single of the song was released in Europe and the United States, by respective record labels. Both promos contain an edited version of "Fear of a Blank Planet" with the swearing removed. The lyrics deal with two common neurobehavioural developmental disorders for teenagers in the 21st century: bipolar disorder and attention deficit disorder.