Chimpanzees enjoy brainteasers, say scientists - Christian Science Monitor

via brain teasers - Google News http://news.google.com/news/url?sa=t&fd=R&usg=AFQjCNFcbJNKQZrOFs07hAWVxLrRRM-UoQ&url=http://www.csmonitor.com/Science/2013/0225/Chimpanzees-enjoy-brainteasers-say-scientists