Big Brains and Dexterous Hands

Primates with larger brains can solve much more complex tasks using their hands than smaller-brained primates. However, improved dexterity comes at a cost. In humans and other large-brained primates, it takes longer for infants to learn the simplest hand and finger movements than our smaller-brained counterparts.

from Neuroscience News https://ift.tt/2P6LR4h