Early birds had four wings. They had wings on their legs more than 100 million years ago.
First, paleontologists spread the word that modern birds are actually living dinosaurs. Then came the news from China that some dinosaurs and related reptiles long ago seemed to be marvelous four-winged creatures, seemingly on standby at some runway for takeoff in flight as early birds.
Birds evolved from feathered dinosaurs. They gradually lost feathers on their feet and then their legs, and today, modern birds have wings on their arms only. Will it be possible for any living beings to fly without wings in some millions of years? Sometimes I fly in my dreams. I imagine my arms as wings.