Uncategorized

  1. Life

    Genetic tweaks manipulate DNA’s loops

    Scientists have changed the loops and curls of DNA as it packs into a nucleus.

    By Laura Sanders
  2. Earth

    4.1-billion-year-old crystal may hold earliest signs of life

    New evidence suggests that life on Earth arose before 4.1 billion years ago, 300 million years earlier than previous estimates.

    By Thomas Sumner
  3. Animals

    Slow, cold reptiles may breathe like energetic birds

    Finding birdlike air patterns in lungs of crocodilians and in more distantly related lizards raises the possibility that one-way airflow evolved far earlier than birds themselves did.

    By Susan Milius
  4. Chemistry

    Zippy videos teach chemistry behind everyday life

    The American Chemical Society breaks down complex reactions of everyday life in zippy online video clips.