If intelligence is partly determined by our genes, how does brain development relate to IQ? An attempt to answer this question measures the size of the outer layer of the brain, the cortex, with surprising results.
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Passingham, R. Brain development and IQ. Nature 440, 619–620 (2006). https://doi.org/10.1038/440619b
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DOI: https://doi.org/10.1038/440619b