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Unformatted text preview: s only arrived in Australia recently (~ 50,000 yrs ago) Australasia – Geographic Extent Biological Barriers Human Evolu3on and Environment • environmental changes have had marked impact on human evoluKon • earliest hominins from Miocene Epoch (7 ‐ 6 m.y.a.) ‐ Africa • during Miocene, Earth’s temperature cooled and rainfall decreased in African tropics • woodlands and grasslands expanded • changed climate and vegetaKon forced some primates down from trees Beginnings and Ancestors Sub‐Family Homininae • Genus Gorilla (gorilla) • Genus Pan (chimpanzees) • Genus Homo (humans) ‐First Homo species arose ~ 2 m.y.a. ‐9 Homo species recognised – 1 survives. Recent Colonisa3on • H. sapiens recent species (Ethiopia ~195, 000 yrs old) • ﬁrst dispersal out of Africa ~ 75,000 yrs ago because condiKons in North Africa before this so arid as to restrict migraKon • iniKal colonisaKon of Australasia VERY recent (N.G. ~ 40,000 y.a.; Australia ~ 50,000 y.a.; N.Z. ~ 1,200 y.a.) • several migraKon routes pos...
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