Cosmos 4 kids
Cosmos4 kids.com: Exploration
Space can be explored in many different ways. Read about space exploration and click on the topics on the right margin to find out how man finds out about his universe.
Smithsonian Institution
National Air and Space Museum: America by Air: Early Commercial Aviation
Commercial airlines took flight soon after the Wright brothers' famous first flights. Read about how the U.S. government encouraged the development of air travel.