Notebook

  1. Genetics

    Bones show Dolly’s arthritis was normal for a sheep her age

    Cloning didn’t cause the famous sheep to age prematurely.

    By Tina Hesman Saey
  2. Health & Medicine

    Step away from the cookie dough. E. coli outbreaks traced to raw flour

    Flour, though low in moisture, can sicken people with E. coli toxins if it is eaten raw.

    By Laurel Hamers
  3. Tech

    50 years ago, artificial limbs weren’t nearly as responsive

    Artificial limbs have come a long way since 1967.

    By Cassie Martin
  4. Astronomy

    Ancient spiral galaxy is 11 billion years old

    The most ancient spiral galaxy seen to date is 11 billion years old and could help reveal how galaxies sprout arms.