We call living things on Earth, crew members and not passengers… Flex and Dux tells us about the earth that is covered by a thin layer of atmosphere and stays in space exactly the right distance from the sun, in order to carry all living things and to keep them alive. We learn that plants, animals and humans, each one of them – no matter how big or small – has a niche (a place and task) to make life possible for all on Earth. The Flixies also learn about the cycle of meat eaters, plant eaters and decomposers!