Forty years ago, the world was introduced to Pink Floyd.
On Aug. 5, 1967, the relatively unknown British band released "The Piper at the Gates of Dawn," the first album from what would be a storied, classic catalog.
Earlier that year the band had recorded several tracks for the movie "Tonite Let's All Make Love in London," two of which were eventually released on the EP "London '66-'67." These extended jams — "Interstellar Overdrive" and "Nick's Boogie" — are Pink Floyd's first known recordings.
Here's a site that has chronicled all of their live performances.