Related by context. Frequent words. (Click for all words.) 53 contagious yawning 50 evolutionary psychologists 50 innate 49 Evolutionary biologists 47 behavioral traits 47 H. sapiens 47 humans 47 autistic traits 46 T. gondii 46 feminine traits 46 hunter gatherer societies 46 synesthetes 46 D cycloserine 46 genetically programmed 46 avian flu viruses 46 inborn 45 effeminacy 45 prosocial 45 vertebrate animals 45 Octopuses 45 sexual dimorphism 45 humanlike 45 prosopagnosia 45 XY chromosomes 45 asexuality 45 recessive genes 44 homing instinct 44 crocodilians 44 BRCA mutation 44 neurotypical 44 sociality 44 genetically inherited 44 intellectually inferior 44 spiritual beings 44 transgenerational 44 Toxoplasma 44 evolutionary psychology 43 mammalian species 43 opposable thumb 43 genetically predisposed 43 subclinical 43 Evolutionary theory 43 sociopathy 43 genetic trait 43 empirical observation 43 bilinguals 43 primitive organisms 43 shorter telomeres 43 heritable 43 suggestibility 43 elevated CRP 42 operant conditioning 42 nonhuman primates 42 APOE4 42 heterosis 42 melanogaster 42 convergent evolution 42 polygyny 42 nonverbally 42 prairie voles 42 theropod dinosaurs 42 evolutionary origins 42 neuroimaging studies 42 epistemic 42 hominins 42 Y. pestis 42 nonbiological 42 habituation 41 genetic predisposition 41 mosasaurs 41 Epidemiological studies 41 trainability 41 circumcision reduces 41 single celled organisms 41 Indohyus 41 personality traits 41 slime molds 41 asexual reproduction 41 herpes viruses 41 Frans de Waal 41 universals 41 hermaphrodites 41 olfaction 41 synaesthesia 41 cone snails 41 psychogenic 41 olfactory receptors 41 relational aggression 41 domesticated cats 41 inferential 41 recessive gene 41 mathematical reasoning 41 Homo sapiens 40 evolutionary adaptation 40 brain lesions 40 femaleness 40 MAOA 40 nonhuman animals 40 Wolbachia 40 Premature ejaculation 40 submissiveness