Holes seem simple enough, until you examine them closely. Marco Bertamini and Camilla Croucher peered at one particular aspect. Their study, called The Shape of Holes, appeared in the journal Cognition. In it, they say: "We discuss the many interesting aspects of holes as a subject of study in different disciplines, and predict that much insight especially about shape will continue to come from holes."…
So begins this week’s Improbable Research column in The Guardian