Why do airplanes look the way they do? Why can't birds fly when they're first born? And why do some paper planes fly farther than others? Ada Twist, Scientist: The Why Files is the perfect nonfiction resource for all these questions and more. Discover everything there is to know about flight from Ada Twist, Scientist-from information about creatures that fly, to the history of aircrafts, to modern technology that allows us to soar through the air faster than ever!