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  1. Tech

    Coming soon: Holographic Skype

    The creators of the fastest telepresence system to date predict real-time 3-D TV in a decade.

    By Marissa Cevallos
  2. Health & Medicine

    MRIs pinpoint time of stroke

    Doing a magnetic resonance scan promptly when a patient arrives at a hospital could render more patients eligible for a time-sensitive clot-busting therapy that can limit brain damage.

    By Nathan Seppa
  3. Chemistry

    Skin is no barrier to BPA, study shows

    The new finding suggests handling store receipts could be a significant source of internal exposure to the hormone-mimicking chemical.

    By Janet Raloff
  4. Earth

    Arctic lake yields climate record

    A Siberian drilling project goes to great lengths to capture an ancient climate record in a 3.6