More details : I talked about three topics , one was specialization of brain hemispheres. **TOPIC 1 : MALE LATERALIZATION for IQ:** Puberty affects IQ, and females, besides having smaller brains, go through puberty sooner. Myelinically sheathed cells dramatically different in females vs males, if a male has a stroke or hit in head with hammer, the male adult never may talk again. A female can learn to talk again no matter which brain half gets damaged. *2018: Prenatal and pubertal testosterone affect brain lateralization* : https://doi.org/10.1016/j.psyneuen.2017.10.027 https://pubmed.ncbi.nlm.nih.gov/29195161/ The PHOTOS of male vs female actual brains is about one of the most censored things on the internet, but one of the most DRAMATIC striking things you will ever see. A female and male brain are DRAMATICALLY different in cross sections. The Photos of Asian vs White vs Mestizo (Hispanic) vs Negro cross sections are rarely ever shared online. Basically the onset of puberty affects the brains IQ and affects its bell curve shape for averages, and blacks suffer from going through puberty first. second topic : **TOPIC 2 : BRAIN FOLDING for IQ :** mammals got "TRNP1 brain folding" that marsupials lack for intelligence; thick science paper: *Trnp1 Regulates Expansion and Folding of the Mammalian Cerebral Cortex by Control of Radial Glial Fate*: https://files.catbox.moe/zb1wgn.pdf Humanoids got"ARHGAP11B brain folding" that other hominids lack for intelligence; thick science paper: *2015 : A gene for brain size - only found in humans (ARHGAP11B)*: https://files.catbox.moe/v4pisv.pdf A Brain Folding primer - *Discrete domains of gene expression in germinal layers distinguish the development of gyrencephaly:* https://files.catbox.moe/yhm2ek.pdf Whites have brain fat metabolism genes no africans have: *Neanderthal ancestry drives evolution of lipid catabolism in contemporary Europeans*: https://www.nature.com/articles/ncomms4584 *Race Differences In Average IQ Are Mostly Genetic*: https://rense.com/general77/racedif.htm **TOPIC 3 : Larger brain is related to IQ:** **Brain size related to IQ is proven:** *brain size still proven relevant - External measures of cognition*: https://www.frontiersin.org/articles/10.3389/fnhum.2011.00108/full https://files.catbox.moe/13e5tu.pdf