Research the prototypes developed and used for NASA's space shuttle program. Then, answer the following questions. Describe one of the prototypes that you researched. In what ways were the space shuttle prototypes designed to make them as inexpensive as possible? What type of prototypes do you think would be necessary to successfully send a manned mission to Mars and to set up a small colony there? How would the prototypes work? What would they be made of? Offer ideas on how the possible prototypes suggested by your peers might be improved, or tested in a more useful or affordable way