Study: Big brains allow dexterous hands

Study: Big brains allow dexterous hands
People are skilled with their hands, but take a long time to learn dexterous abilities. It takes babies generally around five months before they can purposely grip an object. Learning more complicated skills such as eating with fork and knife or tying shoelaces can take another five to six years. By that age, many other primate species already have offspring of their own. Why do we take so much longer than our closest relatives to learn fine motor skills?