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  1. Plants

    Bittersweet fruits

    A new study provides strong evidence that fruits harm predators with the same chemicals that, for example, give chili peppers their spice.

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  2. Health & Medicine

    Running interference on cholesterol

    Injected RNA molecule lowers LDL in rats and monkeys.

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  3. Life

    Humans aided, constrained by fossil fuels

    Maintaining long-term population will require alternate energy sources.

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  4. Space

    Magellanic firestorm

    To celebrate the Hubble Space Telescope’s 100,000th orbit about Earth, astronomers aimed the observatory at a firestorm of stellar activity in the Large Magellanic Cloud, a satellite galaxy of the Milky Way.

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  5. Physics

    Invisibility within sight

    Two new studies take steps toward practical materials that can bend light backward, which could lead to invisibility cloaks.