Beyond being one of the greatest scientists to have ever lived, Richard Feynman revelled in challenging the received notions and flawed assumptions that underpin most of our understandings about how the world is put together.
It was a secret that followed George Harrison to his grave: what exactly was the opening chord to The Beatles' song "A Hard Day's Night"? Perhaps no four seconds of music have ever received such scrutiny.
Looking to fill in the summer break? Why not search for aliens at a Scottish university. Next January, the University of Edinburgh is offering a free, online and wholly legitimate course in the search for extraterrestrial life.