Nature is full of surprises, some of which are so rare or extraordinary that very few people have witnessed them. Once in a Blue Moon delves into these exceptional events, elusive creatures and almost-fantastical phenomena, telling their stories and revealing their mysteries.

Nature is full of surprises, some of which are so rare or extraordinary that very few people have witnessed them. Once in a Blue Moon delves into these exceptional events, elusive creatures and almost-fantastical phenomena, telling their stories and revealing their mysteries.