The Economist reports about research by Steven Piantadosi and Celeste Kidd from the University of Rochester who tried to explain why humans tend to be intelligent. Their answer: Because human babies are extraordinarily helpless when compared with other animals. … human infants take a year to learn even to walk, and need constant supervision for many years afterwards [indeed]. That helplessness is thought to be one consequence of intelligence—or, at least, of brain size. In order to keep...
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