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COVER A human base on the Moon is central to President Bush's new vision for NASA. Scientists are hoping that their dreams for robotic space exploration are also in the picture. A special report on NASA's future, and what it means for space science, begins on page 610. [Image: John Frassanito & Associates Inc.]

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Science. ISSN 0036-8075 (print), 1095-9203 (online)