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Intelligence - nature or nurture? Researchers find a gene for intelligence and also that a bigger brain matters, yet other recent articles show how motivation affects learning.
 

Prenatal exposure to common air pollution linked to cognitive, behavioral impairment

A powerful relationship between prenatal polycyclic aromatic hydrocarbon (PAH) exposure and disturbances in parts of the brain that support information processing and behavioral control have been identified by researchers. The study showed reductions in nearly the entire white matter surface of the brain's left hemisphere -- loss associated with slower processing of information during intelligence testing and more severe behavioral problems, including ADHD and aggression.
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