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  1. Health & Medicine

    Busting blood clots with a nanoparticle

    An experimental technology that delivers medication directly to a dangerous blockage might augment heart attack treatment, a new study finds.

    By Nathan Seppa
  2. Health & Medicine

    Highlights from the American Heart Association Scientific Sessions

    Vitamin D and heart disease, the effectiveness of external defibrillators, a shot to lower cholesterol, and more from the Orlando, Fla., meeting.

    By Nathan Seppa
  3. Health & Medicine

    Magic trick reveals unconscious knowledge

    People know more than they think when it comes to visual information, study shows.

    By Laura Sanders
  4. Physics

    Superconductor may hide long-sought secret

    It conducts electricity without resistance, sure; but a new material could also demonstrate the existence of a particle proposed 70 years ago.