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  1. Life

    Cilia control eating signal

    Little hairlike appendages in brain cells control weight by sequestering an appetite hormone.

    By Tina Hesman Saey
  2. Health & Medicine

    Bedbugs not averse to inbreeding

    The pests have also developed ways to resist common insecticides, research shows.

    By Nathan Seppa
  3. Life

    Building the body electric

    Eyes can be grown in a frog’s gut by changing cells’ electrical properties, scientists find, opening up new possibilities for generating and regenerating complex organs.

    By Tina Hesman Saey
  4. Earth

    Dead Sea once went dry

    The Holy Land’s salt lake ran out of water during a warm spell about 120,000 years ago, which suggests it could disappear again.