Ancient history: to c 500 CE 5 Humanities 4 History 3 History of art / art & design styles 3 Humans 3 human 3 Adaptation, Physiological 2 Altitude 2 Archaeology 2 European history 2 History of art & design styles: c 1800 to c 1900 2 History of art & design styles: from c 1900 - 2 Hypoxia 2 Literary studies: fiction, novelists & prose writers 2 Literature & literary studies 2 Male 2 Philosophy 2 Philosophy: aesthetics 2 Proteome 2 Proteomics 2 Social & cultural anthropology, ethnography 2 Social groups 2 Theory of art 2 Travel writing 2 adaptation 2 altitude 2 controlled study 2 hypobaric hypoxia 2 hypoxia 2 male 2