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  1. Earth

    Oysters under siege: Heat and pollution

    With global warming, some polluted waters could become graveyards for certain shellfish.

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  2. When opposites don’t attract

    The quirks of two kinds of European corn borers are giving researchers a way to study how a single species might split in two.

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  3. Planetary Science

    Far-out science

    New measurements show that the planetoid Sedna spins more rapidly than earlier observations had suggested.

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  4. Health & Medicine

    When the stomach gets low on acid

    A study in mice shows that a shortage of stomach acid can lead to cancer, apparently as a result of bacterial overgrowth and inflammation.