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  1. Humans

    Good times led to grisly custom

    Ancient Chileans developed artificial mummification after an increase in the numbers of living and dead people made naturally preserved bodies hard to ignore.

    By Bruce Bower
  2. Physics

    Molecules get a big chill

    A new cooling method takes big groups of atoms closer to long-sought temperatures for exploring the nature of matter.

    By Alexandra Witze

  3. New research on Native American origins takes anthropologists down memory lane

    In school we learn that science proceeds logically from one experiment to the next, leaving in its wake a complete and certain body of knowledge. But science isn’t like that. It twists and turns, careens and tumbles and gets stuck in deep, sticky mudholes.