In the latest episode of the Mental Floss series List Show, host John Green flashes back to give 80 facts about the 1980s. A small sample of the facts include that it was Cyndi Lauper who recorded the theme song for Pee-wee’s Playhouse, Doc Brown nearly had a pet chimp in Back to the Future, and it took inventor Erno Rubik a month to solve his own famous puzzle cube.