The brain burns the calories it needs to and has little waste The brain uses so much energy, for its weight, that evolution in hominids tries to minimize its mass and any waste. There are 6 brain folding (gyrencephaly) genes in Humans, that create the folding you see on a non-Negroid brain (Neanderthals gave us one). Einstein had excessive brain folding. I dont have all 6 genes handy but here is one MAMMAL (not marsupials) brain folding gene Trnp1 http://dx.doi.org/10.1016/j.cell.2013.03.027 Primates got folding genes : Pax6 https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.1002218 DOI: 10.1371/journal.pbio.1002218 Hominids (apes) got folding genes Humans got brain folding genes (ARHGAP11B is one) as did neanderthals non-blacks got other folding genes from mating with neanderthals In fact, not only can niggers be made more self aware and more sentient by adding missing genes into the negro gene pool, scientists successfully ... **Scientists made monkey brains double in size by splicing them with human genes (ARHGAP11B) ! Super sentient MONKEYS!** ========= https://blackpolitics.org/scientists-make-bigger-monkey-brains-using-human-genes/ anyways... entire large journals are devoted to brain evolution in humans : Cerebral Cortex (CERCOR ) https://academic.oup.com/cercor/article/31/5/2425/6047724 Avians have astounding tricks to increase neuron connections, so mammals could get further tricks. BRAIN FOLDING increases IQ, and nigger and spics have the LEAST brain folding. Forehead volume (frontal lobes) bestows no IQ in northern europeans but provides altruism for winter survival and long range planning for winter survival. Tall Forehead volume also creates honesty in many studies. But the big forehead wastes almost 15 to 18% more calories. TL/DR: A person might on a great day, with stimulant drugs, increase their raw IQ score by 2 or 3 points, but all humans use the same amount of brainpower at their alertness and food level.... 98%.