title: Power of two.
authors.forename: Blake
authors.initials: B
authors.lastname: Edgar
mesh_terms: D000818:Animals; D016645:Aotidae; D005075:Biological Evolution; D005260:Female; D006071:Gorilla gorilla; D015186:Hominidae; D006801:Humans; D008297:Male; D008393:Marriage; D010152:Pair Bond