To summarize, science becomes knowledge by publication of research results. It then may become more general knowledge as writers of textbooks pick and choose what to put in their texts, and as professors and teachers then decide what to stress from those textbooks.
The Hughes H-4 Hercules (also known as the  Spruce Goose ; registration NX37602) is a prototype heavy strategic airlift military transport aircraft designed and built by the Hughes Aircraft Company.oward Hughes was called to testify before the Senate War Investigating Committee in 1947 over the use of government funds for the aircraft. During a Senate hearing on August 6, 1947 (the first of a series of appearances), Hughes said: The Hercules was a monumental undertaking.
4. Southwest Airlines. 720 aircraft. Southwest was a pioneering airline and, apart from a few Boeing 727s operated in its early days, has stuck with the 737 ever since. Today it has a huge fleet of -700 and -800 examples, with older -300s and -500s in the process of retirement.