Humans aren't the only living things that make difficult journeys. The Arctic Tern is an extraordinary bird. It flies up to 35,000 kilometers every year-all around the world from the North Pole to the South Pole and back again! That's more than any other animal. Arctic Terns fly through all types of weather, using the sun and stars to help them. They spend almost all of their life in the air. When they need food, they catch fish from the sea. Some Arctic Terns live thirty years or more-so they travel over one million kilometers in their lifetime. Believe it or not, the bird is only thirty-eight centimeters long and weighs around 300 grams.