What role did cloves play in the european voyages of discovery? - how did european explorers lead to an early form of globalization? - how did sailors and early astronomers help each other out? - why would the moon make a better place than earth from which to launch a mission to mars? - what will be the focus of the american research effort on the international space station? - is it possible to send astronauts to mars? what do people say is the main constraint? - nasa's budget accounts for what share of overall us federal spending? what has the peak been since 1975? - identify two types of consumer goods on which the american people spend more annually than they do on nasa's budget. - how does space exploration encourage the study of science and technology? - how do technologies such as the personal computer or the cell phone lead to economic growth? - how is mri technology a byproduct of the space program?