News

  1. Humans

    Networks dominated by rule of the few

    Certain systems, including social hubs like Facebook, can be directed from relatively few control points.

    By Rachel Ehrenberg
  2. Humans

    ‘Bonding hormone’ linked to post-baby blues

    Low oxytocin levels in pregnant women may help predict whether they will have postpartum depression.

    By Tina Hesman Saey
  3. Space

    Crab Nebula activity keeps confounding

    Unusually rapid fluctuations in the output of a supernova remnant send theorists scuttling for a reasonable explanation.

    By Ron Cowen
  4. Chemistry

    Idling jets pollute more than thought

    Oily droplets emitted by planes operating at low power can turn into potentially toxic airborne particles.