Perspective by Laura Pettenuzzo When a penguin in the wild wants to express its affection for another penguin, they will find a pebble and drop it at the feet of the object of their affection. This ...

When a penguin in the wild wants to express its affection for another penguin, they will find a pebble and drop it at the feet of the object of their affection. This process is known as pebbling.