Report: Tiny gene change affects brain size, IQ

"An international team of scientists said Sunday the largest brain study of its kind had found a gene linked to intelligence, a small piece in the puzzle as to why some people are smarter than others. A variant of this gene 'can tilt the scales in favor of a higher intelligence,' study leader Paul Thompson told AFP, stressing though that genetic blessings were not the only factor in brainpower." (04/15/12)