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  1. Bacteria live inside bacteria in mealybug

    In a new twist on how life forms can exploit each other and with implications for how complex cells originated, scientists have discovered one bacterium living inside another.

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  2. Planetary Science

    Craft tracks giant dust storm on Mars

    The largest dust storm observed on Mars in 25 years is now engulfing the Red Planet.

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  3. Tech

    Setting electronics in artificial stone

    Electronics components made of Portland cement may one day be part of buildngs and roadways that double as gargantuan sensors or other current-carrying devices.

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  4. New Antibiotics Take Poke at Bacteria

    Small rings of amino acids can self-assemble into tubes that punch holes in bacteria.