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

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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The Lure of Nanotechnology

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Probe Flyby to Collect Comet Dust

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