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  1. Health & Medicine

    Osteoporosis drugs delivered wirelessly

    Implanted microchip that releases medications on command has been tested in people for the first time.

    By Rebecca Cheung
  2. Life

    All genes aren’t indispensable

    Even healthy people may have about 20 genes that are completely inactivated, a new study finds.

    By Tina Hesman Saey
  3. Life

    Seeing, feeling have something in common

    A protein needed for eye development is also involved in detecting vibrations.

    By Rachel Ehrenberg
  4. Earth

    Natural gas wells leakier than believed

    Measurements at Colorado site show methane releases are twice as high as previously estimated.

    By Devin Powell
  5. Physics

    Crystals may be possible in time as well as space

    A theory proposes that objects in their lowest energy state can loop through the fourth dimension forever, much as atoms arrange themselves periodically in matter.