MARTIN: So how did it morph? I mean, there've been several iterations of this since, over these many, many hundreds of years. I understand that one of the earlier versions of the rhyme included a racial slur. Walk us through the journey of this rhyme.
RAPHEL: An earlier version of the rhyme that children recited on playgrounds did include a racial slur sometimes. And that then caused a lot of entomologists to do kind of back formations, and say, well, because it had this racial slur, we think it may have had all of these other, you know, African American origins and all of this stuff with it. But it's really hard to - and the history of it is much more complicated than that because the sounds in this rhyme are really sticky. You know, they're like these nonsense syllables that then sound like words that you recognize. So then you stick words that you recognize into the nonsense syllables. And then the words that recognized take on a life of their own.