Primates have always been seen as the most intelligent creatures. There have been many tests that have discovered all of the amazing things they are capable of. One such test found that baboons could recognize four-letter words. They were shown a mix of actual words and random letter combinations on a screen and once trained they could actually tell the difference between the two.
Monkey species have long been among the animals found to be able to use tools, but researchers found that capuchin are even able to work out which of the tools they have available to them will be best for the job. As well as being able to select the tool themselves, they were also seen to watch the other monkeys to see if they had a better tool or technique.