The evolution of powered flight is one of the rarest adaptations made in nature only being possessed by four groups of animals, the birds, bats, pterosaurs and earliest of all the insects. Because the insects evolved so early and because they are the only animals to evolve powered flight that aren't vertebrates the path they took to get airborne is very different. This video seeks to explain what is known about the evolution of the insect wing and how they made the transition.