Post-shuttle, U.S. space explorers need not be human

WASHINGTON (Reuters) - Now that the shuttle fleet is permanently grounded, the U.S. space spotlight could shift toward the path-breaking astronomical science that NASA does without human beings on board.

Source: http://feeds.reuters.com/~r/reuters/scienceNews/~3/XTSOHdfx5gE/us-space-science-idUSTRE7733JZ20110804

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