The riddle of coexistence.
Gibbons
A
A
D000818:Animals; D001106:Archaeology; D005075:Biological Evolution; D002980:Climate; D003469:Culture; D004641:Emigration and Immigration / Q000266:history; D005060:Europe; D005580:Fossils; D049690:History, Ancient; D015186:Hominidae; D006801:Humans; D010163:Paleontology