Uncategorized

  1. Space

    Martian sands

    Sandy soil on the Red Planet hints at an ancient mix of volcanic activity and water, a potent breeding ground for life.

    By Tia Ghose
  2. Space

    Gamma-ray bling!

    A recent, unusually luminous gamma-ray burst is shedding new light on these stellar explosions and the visible light they produce.

    By Ron Cowen
  3. Health & Medicine

    Vacillating stem cells

    Unsuspected, ever-changing variation among stem cells in bone marrow helps determine the development path the cells will follow during differentiation.

    By Patrick Barry
  4. Humans

    Butting out together

    Cigarette smokers who know one another tend to kick the habit all at once, highlighting the importance of social forces in smoking-cessation treatment.