How People Learned to Fly
Contenu
People have taken dangerous risks trying to fly. Some inventors built wings for their arms and flapped them like birds. Some built balloons. Some built machines that glided with the wind. It wasn't easy, though, and it took a long time and much experimentation until people invented the airplane. Read and find out how people learned to fly.
Informations bibliographiques
octobre 2007, 40 Pages, Let's-Read-and-Find-Out Science 2, Anglais
Harper Collins (US)
978-0-06-029558-5