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Another claim is that space exploration is a necessity to mankind and that staying on Earth will lead to extinction. Some of the reasons are lack of natural resources, comets, nuclear war, and worldwide epidemic.
The Importance of Exploration Editor's Note: This is the first in a series of essays on exploration by NASA's Chief Historian, Steven J. Dick. Is space exploration really desirable at a time when so much needs doing on Earth? It is an often-asked and serious question that requires a serious answer. One could present many arguments, from jobs and education to technology development and national security, for undertaking a robust space program.