A story is told about an old woman who interrupts a scientist who is giving a public lecture. In the story he stands before a lectern explaining the nature of the universe.
‘Excuse me young man,’ says the old lady, ‘but you are wrong. The universe is really a flat disc balanced on a turtle’s back.’
‘A ha!’ says the scientist, thinking he has caught her out, ‘but what is the turtle standing on?’
‘You’re very clever young man,’ she says, ‘but I think you’ll find it’s turtles all the way down.’