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Doctors Question Ethics of Baby Gender Test

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Ira Flatow on Science: Crashing into a Comet

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Report Highlights Cancer Risks of Low Radiation

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Cattle Owners Hope High Prices Offset Effects of Mad Cow

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Documentary Captures 'March of the Penguins'

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Stem-Cell Conference Draws Big Crowd

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Mad Cow Case Prompts Doubts on U.S. Testing

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