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  1. Cosmology

    Infinity

    Success in coping with infinity could strengthen case for multiple universes.

    By Tom Siegfried

  2. Nanomaker’s Toolkit

    Scientists harness charge, magnetism and even DNA to guide matter’s assembly into new materials.

    By Solmaz Barazesh

  3. Serotonin: What the gut feeds the bones

    Chemical messenger plays a surprising role in determining the strength of the skeleton.

    By Laura Beil

  4. Quest for energy efficiency needs public engagement

    On April 14, the National Science Board released a draft report called “Building a Sustainable Energy Future,” offering advice on how the United States can transition to renewable and clean sources of energy. Dan Arvizu, the cochairman of the board’s task force on sustainable energy and director of the National Renewable Energy Laboratory in Golden, […]

    By Dan Arvizu

  5. Book Review: 1001 Inventions That Changed the World by Jack Challoner, ed.