Bonobo relaxing on a branch. (Credit:iStockphoto/Ronald Van Der Beek)Web address:http://www.sciencedaily.com/releases/2010/01/100128130217.htmDevelopmental Delay May Explain Behavior of Easygoing Bonobo ApesScienceDaily (Jan. 28, 2010) — New research suggests that evolutionary changes in cognitive development underlie theextensive social and behavioral differences that exist between two closely related species of great apes. The study,published online on January 28th in Current Biology, a Cell Press publication, enhances our understanding of our twoclosest living relatives, chimpanzees and the lesser-known bonobos, and may provide key insight into human evolution.Although chimpanzees and bonobos have a very close genetic relationship with each other, the two species display majordifferences in their physical appearance, behavior, and cognition. For example, when compared to chimpanzees, bonobosseem to be much more peaceful and easygoing, retaining juvenile levels of play as adults, exhibiting low levels ofaggression towards one another, and being much more likely than adult chimpanzees to share resources. It has been
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