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Scientific - Study: Social animals have bigger brains
شنبه 13 اسفند 1390

Study: Social animals have bigger brains

   نوشته شده توسط: فریده جلیلوند    

 

Study: Social animals have bigger brains

LONDON (UPI) -- Dogs have evolved bigger brains than cats because social species of mammals need more brain resources

than solitary animals, U.K. researchers say

Scientists at Oxford University charting the evolutionary history of the brain across different groups of mammals discovered there are huge variations in how the brains of different species have evolved over time, ScienceDaily.com reported

Analyzing data on brain size and body size of more than 500 species, found that groups of mammals that evolved relatively bigger brains, such as monkeys, horses, dolphins and dogs, tend to live in stable social groups

The brains of more solitary mammals, such as cats, deer and rhino, grew much more slowly during the same evolutionary period, they found

"This study overturns the long-held belief that brain size has increased across all mammals," Susanne Shultz of Oxford's Institute of Cognitive and Evolutionary Anthropology says

"Instead, groups of highly social species have undergone much more rapid increases than more solitary species. This suggests that the cooperation and coordination needed for group living can be challenging and over time some mammals have evolved larger brains to be able to cope with the demands of socializing

 

ArcaMax Science & Technology Ezine 


 
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