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  1. Materials Science

    Sun and Sand: Dirty silicon could supply solar power

    Scientists have proposed a way to control the distribution of contaminants in silicon, potentially opening up the use of cheaper starting materials for making solar cells.

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  2. Planetary Science

    Top of the Martian hill

    After a 14-month climb up a Martian hill, NASA's rover Spirit took a panoramic image of the view from the top.

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  3. Thinking the Hurt Away: Expectations hitch ride on pain’s brain pathway

    Positive thinking exerts a calming effect on pain-related brain areas, yielding a substantial reduction in the actual perception of pain, a brain-scan investigation suggests.

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  4. Humans

    Hurricane provisions

    We at Science News express our strong concern and extend our deepest sympathy to those who are suffering through the ongoing ordeal caused by Hurricane Katrina.