Article Correctness Is Author's Responsibility: Big Brains and Dexterous Hands

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This shows some monkeysPrimates 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.