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  1. Health & Medicine

    Cocoa puffs up insulin in blood

    Eating foods flavored with cocoa powder as opposed to other flavorings stimulates surplus production of the sugar-processing hormone insulin, but the metabolic implications of the finding aren’t yet known.

    By Ben Harder
  2. Earth

    New PCBs?

    New studies have begun linking toxic risks with a ubiquitous family of flame retardants.

    By Janet Raloff
  3. Chemistry

    The Nature of Things

    An earth scientist's proposed alternative periodic table of elements is emblematic of the growing desire among scientists to recast this 130-year-old chart.

    By Alexandra Goho

  4. From the October 21, 1933, issue

    COULD YOU DO THIS AT 18 MONTHS? Could you climb a smooth slide as the baby on the front cover does when you were a year and a half old? Of course not.