From: user5108@newsgrouper.org.invalid   
      
   https://neurosciencenews.com/evolution-neuroscience-language-origin-29660/   
      
   Researchers found that humans and marmosets both undergo rapid brain growth   
   right after birth, unlike chimpanzees and macaques, making them especially   
   sensitive to social feedback. These findings reveal how brain development and   
   caregiving environments    
   interact to support the emergence of communication skills.When a baby babbles   
   and their parents respond, these back-and-forth exchanges are more than   
   adorable-if-incoherent chatter — they help to build a baby’s emerging   
   language skills.   
      
   But it turns out this learning strategy makes humans an oddity within the   
   animal kingdom.   
      
   Only a handful of other species — including a few songbirds such as cowbirds   
   and zebra finches — learn to “talk” by noting their parents’ reactions   
   to their initial coos and gurgles.In the new study, led by Princeton Ph.D.   
   student Renata Biazzi,   
    the researchers collected and analyzed previously published data on the brain   
   development of four primate species including humans, marmosets, chimpanzees   
   and rhesus macaques, from conception to adolescence.   
      
   The results suggest that, in early infancy, the brains of humans and marmosets   
   are growing faster than those of other primates. Importantly, most of that   
   growth happens not in the confines of the womb, as is the case for chimpanzees   
   and macaques, but    
   right around the time they are born and first experience the outside world.   
      
   In marmosets, as in humans, this also happens to be an incredibly social time,   
   Ghazanfar said. That’s because marmoset moms, like human mothers, don’t   
   raise their offspring without help. Babies interact with multiple caregivers   
   who respond to every    
   cry   
      
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