Uncategorized

  1. 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
  2. Chemistry

    Idling jets pollute more than thought

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

    By Janet Raloff
  3. Health & Medicine

    Digestive Disease meeting

    Obesity therapy for toddlers, plus digestive issues in athletes, carbs during pregnancy and more from Digestive Disease week 2011.

    By Nathan Seppa
  4. Life

    Animals quickly colonized freshwater

    Fossilized worm burrows show that life had moved beyond the oceans by 530 million years ago.