Notebook

  1. Astronomy

    Cosmic rays maintain their mystery

    Cosmic rays come from all over the universe, including some places we’re not so sure about.

    By Christopher Crockett
  2. Health & Medicine

    Parasite gives a man cancer

    Tapeworms can kick parasitism up a notch to become cancer, a case in Colombia shows.

    By Tina Hesman Saey
  3. Animals

    Hunchbacked conchs jump at the smell of danger

    Hunchbacked conchs are among the most vigorous of snailkind’s few jumpers.

    By Susan Milius
  4. Climate

    How to melt an ice cave

    Frigid winter air keeps gives ice caves their perpetual chill, researchers find, warning that airtight seals on some ice caves could cause the frigid formations to melt within decades.