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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.

    By Charlotte Schubert
  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.

    By Ron Cowen
  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.

    By Peter Weiss

  4. New Antibiotics Take Poke at Bacteria

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