Chimps beat humans in memory tests (restatement summary)

There are many people who think that humans are superior to chimpanzees in all cognitive functions. However it seems it's not true. There was a research made and the result is that young chimpanzees at the age of five have better short-term memory than adult people. So it tells us that early humans may have had better short term memory than modern humans. Moreover, such experiments give us more understanding about the skills necessary for the evolution of modern humanity.