David Kestenbaum David Kestenbaum is a science correspondent for NPR. His job allows him to combine his extensive background in physics with his love of broadcast journalism.
David Kestenbaum
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David Kestenbaum

Critics Doubt NASA's Hubble Plans

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Clues Sought in Ricin Letter

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Senate Capitol Buildings Closed in Ricin Scare

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NASA Struggles to Communicate with Mars Rover

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