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With a Little Help from a Friend

  • Frans B. M de Waal
  • Published: July 17, 2007
  • DOI: 10.1371/journal.pbio.0050190

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Spontaneous Altruism by Chimpanzees and Young Children

Felix Warneken, Brian Hare, Alicia P Melis, Daniel Hanus, Michael Tomasello
Research Article | published 26 Jun 2007 | PLOS Biology
doi:10.1371/journal.pbio.0050184