And now for something completely different: watermelon cubes. No, it's not a new art form. These are real watermelons. Don't panic! It's not diabolical genetic engineering. And it's not a joke. Tesco (the UK's largest supermarket chain, if you're a foreigner) has decided it wants cubed watermelons, because they're easier to stack, take up less shelf space and don't roll about the floor. How? Easy: grow them in square jars. It's a logical step. That's how they grow cucumbers straight. You wouldn't want a curly cucumber, would you?