O vídeo abaixo é um trecho do DVD ´History of Spaceflight´ e mostra algumas das primeiras concepções de possíveis máquinas voadoras.
http://paleo-future.blogspot.com/2007/11/history-of-spaceflight.html
Original (English) content from Paleo-Future (http://paleo-future.blogspot.com/). Content translated with permission, but portuguese text not reviewed by the original author. Please do not distribute beyond this site without permission from both author and translator.