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  1. Animals

    Lizard push-ups grab attention

    Nearby lizards more likely to get the message if its preceded by push-ups

    By Laura Sanders
  2. Paleontology

    Bacteria may play big role in forming fossils

    Bacteria can build a biofilm that preserves a tissue's structure.

    By Sid Perkins
  3. Life

    Protein crucial in preventing Parkinson’s

    By destroying bad mitochondria, Parkin protects cells

    By Tina Hesman Saey

  4. Letters

    Reader letters from the Dec. 6 Science News.

    By Science News

  5. Science Past for December 6, 1958

    Find cell “power plants”—Fragments of mitochondria, microscopic “islands” in the cell protoplasm surrounding the nucleus, are helping scientists find out how a cell gets its energy to carry on vital life processes.