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  1. Alzheimer’s marker yields blood test

    Studies in mice suggest that it could be possible to screen blood for early, asymptomatic Alzheimer's disease.

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  2. Animals

    Egg Shell Game

    Birds apparently cheat chance when it comes to laying eggs that contain sons or daughters.

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  3. Physics

    The Hunt for Antihelium

    Scientists have been searching about 30 years for a single nucleus of helium made from antimatter, and although the discovery would imply that whole antimatter galaxies exist, the researchers' time could be running out.

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  4. Humans

    Letters from the May 12, 2007, issue of Science News

    Saw right through it E.