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  1. Astronomy

    Killer Collision: Dino demise traces to asteroid-family breakup

    The asteroid that wiped out the dinosaurs 65 million years ago was a wayward fragment from a violent collision in the asteroid belt.

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  2. The Venter Decryption: Biologist decodes his own genome

    For the first time, one man's genome, including both sets of chromosomes, has been decoded.

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  3. Animals

    Hive Scourge? Virus linked to recent honeybee die-off

    A poorly understood virus seems to have a connection to the recent widespread demise of honeybees.

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  4. Humans

    Letters from the September 8, 2007, issue of Science News

    Patent pending If Drs.