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  1. Astronomy

    Last Call

    The final mission to service the Hubble Space Telescope could radically transform the observatory, but the crew faces some special challenges.

    By Ron Cowen
  2. Neuroscience

    Breaking the Barrier

    A technique combining ultrasound pulses with microbubbles may help scientists move therapeutic drugs across the brain’s protective divide.

    By Tia Ghose
  3. Life

    Sting Operation

    Scientists use bees and wasps to sniff out the illicit and the dangerous.

    By Susan Gaidos
  4. Life

    A ‘foxi’ gene for dog baldness

    A FOXI3 mutation makes some dogs bald.

    By Tina Hesman Saey
  5. Life

    This bite won’t hurt a bit

    A team dissects the physics of a mosquito bite, working to find a way to design gentler needles.