By Keefer Mar 1, 2021 1967 - Working at Abbey Road studios, London, The Beatles started recording a new John Lennon song "Lucy in the Sky with Diamonds". The song was inspired by a drawing his 3 year-old son Julian returned home from school with one day. The picture, which was of a little girl with lots of stars, was his classmate - Lucy O'Donnell. 1970 - The Beatles make their last appearance on the Ed Sullivan Show when music videos for their songs "Let It Be" and "Two Of Us" are aired. 1973 - Pink Floyd released their eighth studio album The Dark Side Of The Moon. Roger Waters wrote a series of songs about mundane, everyday details which aren't that impressive by themselves, but when given the sonic backdrop of Floyd's slow, atmospheric soundscapes and carefully placed sound effects, they achieve an emotional resonance. The Dark Side of the Moon's lyrical themes include conflict, greed, the passage of time, death, and insanity, the latter inspired in part by Barrett's deteriorating mental state. It remained in the US charts for 741 discontinuous weeks from 1973 to 1988, longer than any other album in history. (Photo credit PAUL BARKER/AFP via Getty Images)